[csharp][netcore] better tests for oneOf with primitive types (#11907)

* update samples

* undo changes for generichost

bin/configs/csharp-netcore-OpenAPIClient-generichost-netcore5.0-nrt.yaml

@@ -1,8 +1,9 @@
 # for csharp-netcore generichost
 generatorName: csharp-netcore
 outputDir: samples/client/petstore/csharp-netcore/OpenAPIClient-generichost-net6.0-nrt
-inputSpec: modules/openapi-generator/src/test/resources/3_0/java/petstore-with-fake-endpoints-models-for-testing-with-http-signature.yaml
+inputSpec: modules/openapi-generator/src/test/resources/3_0/csharp/petstore-with-fake-endpoints-models-for-testing-with-http-signature-generichost.yaml
 library: generichost
+templateDir: modules/openapi-generator/src/main/resources/csharp-netcore
 additionalProperties:
   packageGuid: '{321C8C3F-0156-40C1-AE42-D59761FB9B6C}'
   useCompareNetObjects: true 

bin/configs/csharp-netcore-OpenAPIClient-generichost-netcore5.0.yaml

@@ -1,8 +1,9 @@
 # for csharp-netcore generichost
 generatorName: csharp-netcore
 outputDir: samples/client/petstore/csharp-netcore/OpenAPIClient-generichost-net6.0
-inputSpec: modules/openapi-generator/src/test/resources/3_0/java/petstore-with-fake-endpoints-models-for-testing-with-http-signature.yaml
+inputSpec: modules/openapi-generator/src/test/resources/3_0/csharp/petstore-with-fake-endpoints-models-for-testing-with-http-signature-generichost.yaml
 library: generichost
+templateDir: modules/openapi-generator/src/main/resources/csharp-netcore
 additionalProperties:
   packageGuid: '{321C8C3F-0156-40C1-AE42-D59761FB9B6C}'
   useCompareNetObjects: true 

bin/configs/csharp-netcore-OpenAPIClient-generichost-netstandard2.0.yaml

@@ -1,8 +1,9 @@
 # for csharp-netcore generichost
 generatorName: csharp-netcore
 outputDir: samples/client/petstore/csharp-netcore/OpenAPIClient-generichost-netstandard2.0
-inputSpec: modules/openapi-generator/src/test/resources/3_0/java/petstore-with-fake-endpoints-models-for-testing-with-http-signature.yaml
+inputSpec: modules/openapi-generator/src/test/resources/3_0/csharp/petstore-with-fake-endpoints-models-for-testing-with-http-signature-generichost.yaml
 library: generichost
+templateDir: modules/openapi-generator/src/main/resources/csharp-netcore
 additionalProperties:
   packageGuid: '{321C8C3F-0156-40C1-AE42-D59761FB9B6C}'
   useCompareNetObjects: true 

bin/configs/csharp-netcore-OpenAPIClient-httpclient.yaml

@@ -1,7 +1,7 @@
 # for .net standard httpclient
 generatorName: csharp-netcore
 outputDir: samples/client/petstore/csharp-netcore/OpenAPIClient-httpclient
-inputSpec: modules/openapi-generator/src/test/resources/3_0/java/petstore-with-fake-endpoints-models-for-testing-with-http-signature.yaml
+inputSpec: modules/openapi-generator/src/test/resources/3_0/csharp/petstore-with-fake-endpoints-models-for-testing-with-http-signature.yaml
 templateDir: modules/openapi-generator/src/main/resources/csharp-netcore
 library: httpclient
 additionalProperties:

bin/configs/csharp-netcore-OpenAPIClient-net47.yaml

@@ -1,7 +1,7 @@
 # for .net standard
 generatorName: csharp-netcore
 outputDir: samples/client/petstore/csharp-netcore/OpenAPIClient-net47
-inputSpec: modules/openapi-generator/src/test/resources/3_0/java/petstore-with-fake-endpoints-models-for-testing-with-http-signature.yaml
+inputSpec: modules/openapi-generator/src/test/resources/3_0/csharp/petstore-with-fake-endpoints-models-for-testing-with-http-signature.yaml
 templateDir: modules/openapi-generator/src/main/resources/csharp-netcore
 additionalProperties:
   packageGuid: '{321C8C3F-0156-40C1-AE42-D59761FB9B6C}'

bin/configs/csharp-netcore-OpenAPIClient-net50.yaml

@@ -1,7 +1,7 @@
 # for .net standard
 generatorName: csharp-netcore
 outputDir: samples/client/petstore/csharp-netcore/OpenAPIClient-net5.0
-inputSpec: modules/openapi-generator/src/test/resources/3_0/java/petstore-with-fake-endpoints-models-for-testing-with-http-signature.yaml
+inputSpec: modules/openapi-generator/src/test/resources/3_0/csharp/petstore-with-fake-endpoints-models-for-testing-with-http-signature.yaml
 templateDir: modules/openapi-generator/src/main/resources/csharp-netcore
 additionalProperties:
   packageGuid: '{321C8C3F-0156-40C1-AE42-D59761FB9B6C}'

bin/configs/csharp-netcore-OpenAPIClient.yaml

@@ -1,7 +1,7 @@
 # for .net standard
 generatorName: csharp-netcore
 outputDir: samples/client/petstore/csharp-netcore/OpenAPIClient
-inputSpec: modules/openapi-generator/src/test/resources/3_0/java/petstore-with-fake-endpoints-models-for-testing-with-http-signature.yaml
+inputSpec: modules/openapi-generator/src/test/resources/3_0/csharp/petstore-with-fake-endpoints-models-for-testing-with-http-signature.yaml
 templateDir: modules/openapi-generator/src/main/resources/csharp-netcore
 additionalProperties:
   packageGuid: '{321C8C3F-0156-40C1-AE42-D59761FB9B6C}'

bin/configs/csharp-netcore-OpenAPIClientCore.yaml

@@ -1,6 +1,6 @@
 generatorName: csharp-netcore
 outputDir: samples/client/petstore/csharp-netcore/OpenAPIClientCore
-inputSpec: modules/openapi-generator/src/test/resources/3_0/java/petstore-with-fake-endpoints-models-for-testing-with-http-signature.yaml
+inputSpec: modules/openapi-generator/src/test/resources/3_0/csharp/petstore-with-fake-endpoints-models-for-testing-with-http-signature.yaml
 templateDir: modules/openapi-generator/src/main/resources/csharp-netcore
 additionalProperties:
   packageGuid: '{321C8C3F-0156-40C1-AE42-D59761FB9B6C}'

bin/configs/csharp-netcore-OpenAPIClient_ConditionalSerialization.yaml

@@ -1,7 +1,7 @@
 # for .net standard
 generatorName: csharp-netcore
 outputDir: samples/client/petstore/csharp-netcore/OpenAPIClient-ConditionalSerialization
-inputSpec: modules/openapi-generator/src/test/resources/3_0/java/petstore-with-fake-endpoints-models-for-testing-with-http-signature.yaml
+inputSpec: modules/openapi-generator/src/test/resources/3_0/csharp/petstore-with-fake-endpoints-models-for-testing-with-http-signature.yaml
 templateDir: modules/openapi-generator/src/main/resources/csharp-netcore
 additionalProperties:
   packageGuid: '{fa96c953-af24-457d-8a01-f2fd2a7547a9}'
@@ -9,4 +9,4 @@ additionalProperties:
   disallowAdditionalPropertiesIfNotPresent: false
   useOneOfDiscriminatorLookup: true
   targetFramework:  netstandard2.0
-  conditionalSerialization: true
+  conditionalSerialization: true

samples/client/petstore/csharp-netcore/OpenAPIClient-ConditionalSerialization/.openapi-generator/FILES

@@ -67,6 +67,7 @@ docs/ParentPet.md
 docs/Pet.md
 docs/PetApi.md
 docs/Pig.md
+docs/PolymorphicProperty.md
 docs/Quadrilateral.md
 docs/QuadrilateralInterface.md
 docs/ReadOnlyFirst.md
@@ -172,6 +173,7 @@ src/Org.OpenAPITools/Model/OuterEnumIntegerDefaultValue.cs
 src/Org.OpenAPITools/Model/ParentPet.cs
 src/Org.OpenAPITools/Model/Pet.cs
 src/Org.OpenAPITools/Model/Pig.cs
+src/Org.OpenAPITools/Model/PolymorphicProperty.cs
 src/Org.OpenAPITools/Model/Quadrilateral.cs
 src/Org.OpenAPITools/Model/QuadrilateralInterface.cs
 src/Org.OpenAPITools/Model/ReadOnlyFirst.cs

samples/client/petstore/csharp-netcore/OpenAPIClient-ConditionalSerialization/README.md

@@ -207,6 +207,7 @@ Class | Method | HTTP request | Description
  - [Model.ParentPet](docs/ParentPet.md)
  - [Model.Pet](docs/Pet.md)
  - [Model.Pig](docs/Pig.md)
+ - [Model.PolymorphicProperty](docs/PolymorphicProperty.md)
  - [Model.Quadrilateral](docs/Quadrilateral.md)
  - [Model.QuadrilateralInterface](docs/QuadrilateralInterface.md)
  - [Model.ReadOnlyFirst](docs/ReadOnlyFirst.md)

samples/client/petstore/csharp-netcore/OpenAPIClient-ConditionalSerialization/docs/PolymorphicProperty.md

@@ -0,0 +1,9 @@
+# Org.OpenAPITools.Model.PolymorphicProperty
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+

samples/client/petstore/csharp-netcore/OpenAPIClient-ConditionalSerialization/src/Org.OpenAPITools.Test/Model/PolymorphicPropertyTests.cs

@@ -0,0 +1,62 @@
+/*
+ * OpenAPI Petstore
+ *
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * Generated by: https://github.com/openapitools/openapi-generator.git
+ */
+
+
+using Xunit;
+
+using System;
+using System.Linq;
+using System.IO;
+using System.Collections.Generic;
+using Org.OpenAPITools.Api;
+using Org.OpenAPITools.Model;
+using Org.OpenAPITools.Client;
+using System.Reflection;
+using Newtonsoft.Json;
+
+namespace Org.OpenAPITools.Test.Model
+{
+    /// <summary>
+    ///  Class for testing PolymorphicProperty
+    /// </summary>
+    /// <remarks>
+    /// This file is automatically generated by OpenAPI Generator (https://openapi-generator.tech).
+    /// Please update the test case below to test the model.
+    /// </remarks>
+    public class PolymorphicPropertyTests : IDisposable
+    {
+        // TODO uncomment below to declare an instance variable for PolymorphicProperty
+        //private PolymorphicProperty instance;
+
+        public PolymorphicPropertyTests()
+        {
+            // TODO uncomment below to create an instance of PolymorphicProperty
+            //instance = new PolymorphicProperty();
+        }
+
+        public void Dispose()
+        {
+            // Cleanup when everything is done.
+        }
+
+        /// <summary>
+        /// Test an instance of PolymorphicProperty
+        /// </summary>
+        [Fact]
+        public void PolymorphicPropertyInstanceTest()
+        {
+            // TODO uncomment below to test "IsType" PolymorphicProperty
+            //Assert.IsType<PolymorphicProperty>(instance);
+        }
+
+
+
+    }
+
+}

samples/client/petstore/csharp-netcore/OpenAPIClient-ConditionalSerialization/src/Org.OpenAPITools/Model/PolymorphicProperty.cs

@@ -0,0 +1,383 @@
+/*
+ * OpenAPI Petstore
+ *
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * Generated by: https://github.com/openapitools/openapi-generator.git
+ */
+
+
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Linq;
+using System.IO;
+using System.Runtime.Serialization;
+using System.Text;
+using System.Text.RegularExpressions;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Converters;
+using Newtonsoft.Json.Linq;
+using System.ComponentModel.DataAnnotations;
+using OpenAPIDateConverter = Org.OpenAPITools.Client.OpenAPIDateConverter;
+using OpenAPIClientUtils = Org.OpenAPITools.Client.ClientUtils;
+using System.Reflection;
+
+namespace Org.OpenAPITools.Model
+{
+    /// <summary>
+    /// PolymorphicProperty
+    /// </summary>
+    [JsonConverter(typeof(PolymorphicPropertyJsonConverter))]
+    [DataContract(Name = "PolymorphicProperty")]
+    public partial class PolymorphicProperty : AbstractOpenAPISchema, IEquatable<PolymorphicProperty>, IValidatableObject
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="PolymorphicProperty" /> class
+        /// with the <see cref="bool" /> class
+        /// </summary>
+        /// <param name="actualInstance">An instance of bool.</param>
+        public PolymorphicProperty(bool actualInstance)
+        {
+            this.IsNullable = false;
+            this.SchemaType= "oneOf";
+            this.ActualInstance = actualInstance;
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="PolymorphicProperty" /> class
+        /// with the <see cref="string" /> class
+        /// </summary>
+        /// <param name="actualInstance">An instance of string.</param>
+        public PolymorphicProperty(string actualInstance)
+        {
+            this.IsNullable = false;
+            this.SchemaType= "oneOf";
+            this.ActualInstance = actualInstance ?? throw new ArgumentException("Invalid instance found. Must not be null.");
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="PolymorphicProperty" /> class
+        /// with the <see cref="Object" /> class
+        /// </summary>
+        /// <param name="actualInstance">An instance of Object.</param>
+        public PolymorphicProperty(Object actualInstance)
+        {
+            this.IsNullable = false;
+            this.SchemaType= "oneOf";
+            this.ActualInstance = actualInstance ?? throw new ArgumentException("Invalid instance found. Must not be null.");
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="PolymorphicProperty" /> class
+        /// with the <see cref="List&lt;string&gt;" /> class
+        /// </summary>
+        /// <param name="actualInstance">An instance of List&lt;string&gt;.</param>
+        public PolymorphicProperty(List<string> actualInstance)
+        {
+            this.IsNullable = false;
+            this.SchemaType= "oneOf";
+            this.ActualInstance = actualInstance ?? throw new ArgumentException("Invalid instance found. Must not be null.");
+        }
+
+
+        private Object _actualInstance;
+
+        /// <summary>
+        /// Gets or Sets ActualInstance
+        /// </summary>
+        public override Object ActualInstance
+        {
+            get
+            {
+                return _actualInstance;
+            }
+            set
+            {
+                if (value.GetType() == typeof(List<string>))
+                {
+                    this._actualInstance = value;
+                }
+                else if (value.GetType() == typeof(Object))
+                {
+                    this._actualInstance = value;
+                }
+                else if (value.GetType() == typeof(bool))
+                {
+                    this._actualInstance = value;
+                }
+                else if (value.GetType() == typeof(string))
+                {
+                    this._actualInstance = value;
+                }
+                else
+                {
+                    throw new ArgumentException("Invalid instance found. Must be the following types: List<string>, Object, bool, string");
+                }
+            }
+        }
+
+        /// <summary>
+        /// Get the actual instance of `bool`. If the actual instance is not `bool`,
+        /// the InvalidClassException will be thrown
+        /// </summary>
+        /// <returns>An instance of bool</returns>
+        public bool GetBool()
+        {
+            return (bool)this.ActualInstance;
+        }
+
+        /// <summary>
+        /// Get the actual instance of `string`. If the actual instance is not `string`,
+        /// the InvalidClassException will be thrown
+        /// </summary>
+        /// <returns>An instance of string</returns>
+        public string GetString()
+        {
+            return (string)this.ActualInstance;
+        }
+
+        /// <summary>
+        /// Get the actual instance of `Object`. If the actual instance is not `Object`,
+        /// the InvalidClassException will be thrown
+        /// </summary>
+        /// <returns>An instance of Object</returns>
+        public Object GetObject()
+        {
+            return (Object)this.ActualInstance;
+        }
+
+        /// <summary>
+        /// Get the actual instance of `List&lt;string&gt;`. If the actual instance is not `List&lt;string&gt;`,
+        /// the InvalidClassException will be thrown
+        /// </summary>
+        /// <returns>An instance of List&lt;string&gt;</returns>
+        public List<string> GetListString()
+        {
+            return (List<string>)this.ActualInstance;
+        }
+
+        /// <summary>
+        /// Returns the string presentation of the object
+        /// </summary>
+        /// <returns>String presentation of the object</returns>
+        public override string ToString()
+        {
+            var sb = new StringBuilder();
+            sb.Append("class PolymorphicProperty {\n");
+            sb.Append("  ActualInstance: ").Append(this.ActualInstance).Append("\n");
+            sb.Append("}\n");
+            return sb.ToString();
+        }
+
+        /// <summary>
+        /// Returns the JSON string presentation of the object
+        /// </summary>
+        /// <returns>JSON string presentation of the object</returns>
+        public override string ToJson()
+        {
+            return JsonConvert.SerializeObject(this.ActualInstance, PolymorphicProperty.SerializerSettings);
+        }
+
+        /// <summary>
+        /// Converts the JSON string into an instance of PolymorphicProperty
+        /// </summary>
+        /// <param name="jsonString">JSON string</param>
+        /// <returns>An instance of PolymorphicProperty</returns>
+        public static PolymorphicProperty FromJson(string jsonString)
+        {
+            PolymorphicProperty newPolymorphicProperty = null;
+
+            if (string.IsNullOrEmpty(jsonString))
+            {
+                return newPolymorphicProperty;
+            }
+            int match = 0;
+            List<string> matchedTypes = new List<string>();
+
+            try
+            {
+                // if it does not contains "AdditionalProperties", use SerializerSettings to deserialize
+                if (typeof(List<string>).GetProperty("AdditionalProperties") == null)
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<List<string>>(jsonString, PolymorphicProperty.SerializerSettings));
+                }
+                else
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<List<string>>(jsonString, PolymorphicProperty.AdditionalPropertiesSerializerSettings));
+                }
+                matchedTypes.Add("List<string>");
+                match++;
+            }
+            catch (Exception exception)
+            {
+                // deserialization failed, try the next one
+                System.Diagnostics.Debug.WriteLine(string.Format("Failed to deserialize `{0}` into List<string>: {1}", jsonString, exception.ToString()));
+            }
+
+            try
+            {
+                // if it does not contains "AdditionalProperties", use SerializerSettings to deserialize
+                if (typeof(Object).GetProperty("AdditionalProperties") == null)
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<Object>(jsonString, PolymorphicProperty.SerializerSettings));
+                }
+                else
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<Object>(jsonString, PolymorphicProperty.AdditionalPropertiesSerializerSettings));
+                }
+                matchedTypes.Add("Object");
+                match++;
+            }
+            catch (Exception exception)
+            {
+                // deserialization failed, try the next one
+                System.Diagnostics.Debug.WriteLine(string.Format("Failed to deserialize `{0}` into Object: {1}", jsonString, exception.ToString()));
+            }
+
+            try
+            {
+                // if it does not contains "AdditionalProperties", use SerializerSettings to deserialize
+                if (typeof(bool).GetProperty("AdditionalProperties") == null)
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<bool>(jsonString, PolymorphicProperty.SerializerSettings));
+                }
+                else
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<bool>(jsonString, PolymorphicProperty.AdditionalPropertiesSerializerSettings));
+                }
+                matchedTypes.Add("bool");
+                match++;
+            }
+            catch (Exception exception)
+            {
+                // deserialization failed, try the next one
+                System.Diagnostics.Debug.WriteLine(string.Format("Failed to deserialize `{0}` into bool: {1}", jsonString, exception.ToString()));
+            }
+
+            try
+            {
+                // if it does not contains "AdditionalProperties", use SerializerSettings to deserialize
+                if (typeof(string).GetProperty("AdditionalProperties") == null)
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<string>(jsonString, PolymorphicProperty.SerializerSettings));
+                }
+                else
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<string>(jsonString, PolymorphicProperty.AdditionalPropertiesSerializerSettings));
+                }
+                matchedTypes.Add("string");
+                match++;
+            }
+            catch (Exception exception)
+            {
+                // deserialization failed, try the next one
+                System.Diagnostics.Debug.WriteLine(string.Format("Failed to deserialize `{0}` into string: {1}", jsonString, exception.ToString()));
+            }
+
+            if (match == 0)
+            {
+                throw new InvalidDataException("The JSON string `" + jsonString + "` cannot be deserialized into any schema defined.");
+            }
+            else if (match > 1)
+            {
+                throw new InvalidDataException("The JSON string `" + jsonString + "` incorrectly matches more than one schema (should be exactly one match): " + matchedTypes);
+            }
+
+            // deserialization is considered successful at this point if no exception has been thrown.
+            return newPolymorphicProperty;
+        }
+
+        /// <summary>
+        /// Returns true if objects are equal
+        /// </summary>
+        /// <param name="input">Object to be compared</param>
+        /// <returns>Boolean</returns>
+        public override bool Equals(object input)
+        {
+            return OpenAPIClientUtils.compareLogic.Compare(this, input as PolymorphicProperty).AreEqual;
+        }
+
+        /// <summary>
+        /// Returns true if PolymorphicProperty instances are equal
+        /// </summary>
+        /// <param name="input">Instance of PolymorphicProperty to be compared</param>
+        /// <returns>Boolean</returns>
+        public bool Equals(PolymorphicProperty input)
+        {
+            return OpenAPIClientUtils.compareLogic.Compare(this, input).AreEqual;
+        }
+
+        /// <summary>
+        /// Gets the hash code
+        /// </summary>
+        /// <returns>Hash code</returns>
+        public override int GetHashCode()
+        {
+            unchecked // Overflow is fine, just wrap
+            {
+                int hashCode = 41;
+                if (this.ActualInstance != null)
+                    hashCode = hashCode * 59 + this.ActualInstance.GetHashCode();
+                return hashCode;
+            }
+        }
+
+        /// <summary>
+        /// To validate all properties of the instance
+        /// </summary>
+        /// <param name="validationContext">Validation context</param>
+        /// <returns>Validation Result</returns>
+        IEnumerable<System.ComponentModel.DataAnnotations.ValidationResult> IValidatableObject.Validate(ValidationContext validationContext)
+        {
+            yield break;
+        }
+    }
+
+    /// <summary>
+    /// Custom JSON converter for PolymorphicProperty
+    /// </summary>
+    public class PolymorphicPropertyJsonConverter : JsonConverter
+    {
+        /// <summary>
+        /// To write the JSON string
+        /// </summary>
+        /// <param name="writer">JSON writer</param>
+        /// <param name="value">Object to be converted into a JSON string</param>
+        /// <param name="serializer">JSON Serializer</param>
+        public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
+        {
+            writer.WriteRawValue((string)(typeof(PolymorphicProperty).GetMethod("ToJson").Invoke(value, null)));
+        }
+
+        /// <summary>
+        /// To convert a JSON string into an object
+        /// </summary>
+        /// <param name="reader">JSON reader</param>
+        /// <param name="objectType">Object type</param>
+        /// <param name="existingValue">Existing value</param>
+        /// <param name="serializer">JSON Serializer</param>
+        /// <returns>The object converted from the JSON string</returns>
+        public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
+        {
+            if(reader.TokenType != JsonToken.Null)
+            {
+                return PolymorphicProperty.FromJson(JObject.Load(reader).ToString(Formatting.None));
+            }
+            return null;
+        }
+
+        /// <summary>
+        /// Check if the object can be converted
+        /// </summary>
+        /// <param name="objectType">Object type</param>
+        /// <returns>True if the object can be converted</returns>
+        public override bool CanConvert(Type objectType)
+        {
+            return false;
+        }
+    }
+
+}

samples/client/petstore/csharp-netcore/OpenAPIClient-httpclient/.openapi-generator/FILES

@@ -67,6 +67,7 @@ docs/ParentPet.md
 docs/Pet.md
 docs/PetApi.md
 docs/Pig.md
+docs/PolymorphicProperty.md
 docs/Quadrilateral.md
 docs/QuadrilateralInterface.md
 docs/ReadOnlyFirst.md
@@ -172,6 +173,7 @@ src/Org.OpenAPITools/Model/OuterEnumIntegerDefaultValue.cs
 src/Org.OpenAPITools/Model/ParentPet.cs
 src/Org.OpenAPITools/Model/Pet.cs
 src/Org.OpenAPITools/Model/Pig.cs
+src/Org.OpenAPITools/Model/PolymorphicProperty.cs
 src/Org.OpenAPITools/Model/Quadrilateral.cs
 src/Org.OpenAPITools/Model/QuadrilateralInterface.cs
 src/Org.OpenAPITools/Model/ReadOnlyFirst.cs

samples/client/petstore/csharp-netcore/OpenAPIClient-httpclient/README.md

@@ -232,6 +232,7 @@ Class | Method | HTTP request | Description
  - [Model.ParentPet](docs/ParentPet.md)
  - [Model.Pet](docs/Pet.md)
  - [Model.Pig](docs/Pig.md)
+ - [Model.PolymorphicProperty](docs/PolymorphicProperty.md)
  - [Model.Quadrilateral](docs/Quadrilateral.md)
  - [Model.QuadrilateralInterface](docs/QuadrilateralInterface.md)
  - [Model.ReadOnlyFirst](docs/ReadOnlyFirst.md)

samples/client/petstore/csharp-netcore/OpenAPIClient-httpclient/docs/PolymorphicProperty.md

@@ -0,0 +1,9 @@
+# Org.OpenAPITools.Model.PolymorphicProperty
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+

samples/client/petstore/csharp-netcore/OpenAPIClient-httpclient/src/Org.OpenAPITools.Test/Model/PolymorphicPropertyTests.cs

@@ -0,0 +1,62 @@
+/*
+ * OpenAPI Petstore
+ *
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * Generated by: https://github.com/openapitools/openapi-generator.git
+ */
+
+
+using Xunit;
+
+using System;
+using System.Linq;
+using System.IO;
+using System.Collections.Generic;
+using Org.OpenAPITools.Api;
+using Org.OpenAPITools.Model;
+using Org.OpenAPITools.Client;
+using System.Reflection;
+using Newtonsoft.Json;
+
+namespace Org.OpenAPITools.Test.Model
+{
+    /// <summary>
+    ///  Class for testing PolymorphicProperty
+    /// </summary>
+    /// <remarks>
+    /// This file is automatically generated by OpenAPI Generator (https://openapi-generator.tech).
+    /// Please update the test case below to test the model.
+    /// </remarks>
+    public class PolymorphicPropertyTests : IDisposable
+    {
+        // TODO uncomment below to declare an instance variable for PolymorphicProperty
+        //private PolymorphicProperty instance;
+
+        public PolymorphicPropertyTests()
+        {
+            // TODO uncomment below to create an instance of PolymorphicProperty
+            //instance = new PolymorphicProperty();
+        }
+
+        public void Dispose()
+        {
+            // Cleanup when everything is done.
+        }
+
+        /// <summary>
+        /// Test an instance of PolymorphicProperty
+        /// </summary>
+        [Fact]
+        public void PolymorphicPropertyInstanceTest()
+        {
+            // TODO uncomment below to test "IsType" PolymorphicProperty
+            //Assert.IsType<PolymorphicProperty>(instance);
+        }
+
+
+
+    }
+
+}

samples/client/petstore/csharp-netcore/OpenAPIClient-httpclient/src/Org.OpenAPITools/Model/PolymorphicProperty.cs

@@ -0,0 +1,384 @@
+/*
+ * OpenAPI Petstore
+ *
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * Generated by: https://github.com/openapitools/openapi-generator.git
+ */
+
+
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Linq;
+using System.IO;
+using System.Runtime.Serialization;
+using System.Text;
+using System.Text.RegularExpressions;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Converters;
+using Newtonsoft.Json.Linq;
+using System.ComponentModel.DataAnnotations;
+using FileParameter = Org.OpenAPITools.Client.FileParameter;
+using OpenAPIDateConverter = Org.OpenAPITools.Client.OpenAPIDateConverter;
+using OpenAPIClientUtils = Org.OpenAPITools.Client.ClientUtils;
+using System.Reflection;
+
+namespace Org.OpenAPITools.Model
+{
+    /// <summary>
+    /// PolymorphicProperty
+    /// </summary>
+    [JsonConverter(typeof(PolymorphicPropertyJsonConverter))]
+    [DataContract(Name = "PolymorphicProperty")]
+    public partial class PolymorphicProperty : AbstractOpenAPISchema, IEquatable<PolymorphicProperty>, IValidatableObject
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="PolymorphicProperty" /> class
+        /// with the <see cref="bool" /> class
+        /// </summary>
+        /// <param name="actualInstance">An instance of bool.</param>
+        public PolymorphicProperty(bool actualInstance)
+        {
+            this.IsNullable = false;
+            this.SchemaType= "oneOf";
+            this.ActualInstance = actualInstance;
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="PolymorphicProperty" /> class
+        /// with the <see cref="string" /> class
+        /// </summary>
+        /// <param name="actualInstance">An instance of string.</param>
+        public PolymorphicProperty(string actualInstance)
+        {
+            this.IsNullable = false;
+            this.SchemaType= "oneOf";
+            this.ActualInstance = actualInstance ?? throw new ArgumentException("Invalid instance found. Must not be null.");
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="PolymorphicProperty" /> class
+        /// with the <see cref="Object" /> class
+        /// </summary>
+        /// <param name="actualInstance">An instance of Object.</param>
+        public PolymorphicProperty(Object actualInstance)
+        {
+            this.IsNullable = false;
+            this.SchemaType= "oneOf";
+            this.ActualInstance = actualInstance ?? throw new ArgumentException("Invalid instance found. Must not be null.");
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="PolymorphicProperty" /> class
+        /// with the <see cref="List&lt;string&gt;" /> class
+        /// </summary>
+        /// <param name="actualInstance">An instance of List&lt;string&gt;.</param>
+        public PolymorphicProperty(List<string> actualInstance)
+        {
+            this.IsNullable = false;
+            this.SchemaType= "oneOf";
+            this.ActualInstance = actualInstance ?? throw new ArgumentException("Invalid instance found. Must not be null.");
+        }
+
+
+        private Object _actualInstance;
+
+        /// <summary>
+        /// Gets or Sets ActualInstance
+        /// </summary>
+        public override Object ActualInstance
+        {
+            get
+            {
+                return _actualInstance;
+            }
+            set
+            {
+                if (value.GetType() == typeof(List<string>))
+                {
+                    this._actualInstance = value;
+                }
+                else if (value.GetType() == typeof(Object))
+                {
+                    this._actualInstance = value;
+                }
+                else if (value.GetType() == typeof(bool))
+                {
+                    this._actualInstance = value;
+                }
+                else if (value.GetType() == typeof(string))
+                {
+                    this._actualInstance = value;
+                }
+                else
+                {
+                    throw new ArgumentException("Invalid instance found. Must be the following types: List<string>, Object, bool, string");
+                }
+            }
+        }
+
+        /// <summary>
+        /// Get the actual instance of `bool`. If the actual instance is not `bool`,
+        /// the InvalidClassException will be thrown
+        /// </summary>
+        /// <returns>An instance of bool</returns>
+        public bool GetBool()
+        {
+            return (bool)this.ActualInstance;
+        }
+
+        /// <summary>
+        /// Get the actual instance of `string`. If the actual instance is not `string`,
+        /// the InvalidClassException will be thrown
+        /// </summary>
+        /// <returns>An instance of string</returns>
+        public string GetString()
+        {
+            return (string)this.ActualInstance;
+        }
+
+        /// <summary>
+        /// Get the actual instance of `Object`. If the actual instance is not `Object`,
+        /// the InvalidClassException will be thrown
+        /// </summary>
+        /// <returns>An instance of Object</returns>
+        public Object GetObject()
+        {
+            return (Object)this.ActualInstance;
+        }
+
+        /// <summary>
+        /// Get the actual instance of `List&lt;string&gt;`. If the actual instance is not `List&lt;string&gt;`,
+        /// the InvalidClassException will be thrown
+        /// </summary>
+        /// <returns>An instance of List&lt;string&gt;</returns>
+        public List<string> GetListString()
+        {
+            return (List<string>)this.ActualInstance;
+        }
+
+        /// <summary>
+        /// Returns the string presentation of the object
+        /// </summary>
+        /// <returns>String presentation of the object</returns>
+        public override string ToString()
+        {
+            var sb = new StringBuilder();
+            sb.Append("class PolymorphicProperty {\n");
+            sb.Append("  ActualInstance: ").Append(this.ActualInstance).Append("\n");
+            sb.Append("}\n");
+            return sb.ToString();
+        }
+
+        /// <summary>
+        /// Returns the JSON string presentation of the object
+        /// </summary>
+        /// <returns>JSON string presentation of the object</returns>
+        public override string ToJson()
+        {
+            return JsonConvert.SerializeObject(this.ActualInstance, PolymorphicProperty.SerializerSettings);
+        }
+
+        /// <summary>
+        /// Converts the JSON string into an instance of PolymorphicProperty
+        /// </summary>
+        /// <param name="jsonString">JSON string</param>
+        /// <returns>An instance of PolymorphicProperty</returns>
+        public static PolymorphicProperty FromJson(string jsonString)
+        {
+            PolymorphicProperty newPolymorphicProperty = null;
+
+            if (string.IsNullOrEmpty(jsonString))
+            {
+                return newPolymorphicProperty;
+            }
+            int match = 0;
+            List<string> matchedTypes = new List<string>();
+
+            try
+            {
+                // if it does not contains "AdditionalProperties", use SerializerSettings to deserialize
+                if (typeof(List<string>).GetProperty("AdditionalProperties") == null)
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<List<string>>(jsonString, PolymorphicProperty.SerializerSettings));
+                }
+                else
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<List<string>>(jsonString, PolymorphicProperty.AdditionalPropertiesSerializerSettings));
+                }
+                matchedTypes.Add("List<string>");
+                match++;
+            }
+            catch (Exception exception)
+            {
+                // deserialization failed, try the next one
+                System.Diagnostics.Debug.WriteLine(string.Format("Failed to deserialize `{0}` into List<string>: {1}", jsonString, exception.ToString()));
+            }
+
+            try
+            {
+                // if it does not contains "AdditionalProperties", use SerializerSettings to deserialize
+                if (typeof(Object).GetProperty("AdditionalProperties") == null)
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<Object>(jsonString, PolymorphicProperty.SerializerSettings));
+                }
+                else
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<Object>(jsonString, PolymorphicProperty.AdditionalPropertiesSerializerSettings));
+                }
+                matchedTypes.Add("Object");
+                match++;
+            }
+            catch (Exception exception)
+            {
+                // deserialization failed, try the next one
+                System.Diagnostics.Debug.WriteLine(string.Format("Failed to deserialize `{0}` into Object: {1}", jsonString, exception.ToString()));
+            }
+
+            try
+            {
+                // if it does not contains "AdditionalProperties", use SerializerSettings to deserialize
+                if (typeof(bool).GetProperty("AdditionalProperties") == null)
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<bool>(jsonString, PolymorphicProperty.SerializerSettings));
+                }
+                else
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<bool>(jsonString, PolymorphicProperty.AdditionalPropertiesSerializerSettings));
+                }
+                matchedTypes.Add("bool");
+                match++;
+            }
+            catch (Exception exception)
+            {
+                // deserialization failed, try the next one
+                System.Diagnostics.Debug.WriteLine(string.Format("Failed to deserialize `{0}` into bool: {1}", jsonString, exception.ToString()));
+            }
+
+            try
+            {
+                // if it does not contains "AdditionalProperties", use SerializerSettings to deserialize
+                if (typeof(string).GetProperty("AdditionalProperties") == null)
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<string>(jsonString, PolymorphicProperty.SerializerSettings));
+                }
+                else
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<string>(jsonString, PolymorphicProperty.AdditionalPropertiesSerializerSettings));
+                }
+                matchedTypes.Add("string");
+                match++;
+            }
+            catch (Exception exception)
+            {
+                // deserialization failed, try the next one
+                System.Diagnostics.Debug.WriteLine(string.Format("Failed to deserialize `{0}` into string: {1}", jsonString, exception.ToString()));
+            }
+
+            if (match == 0)
+            {
+                throw new InvalidDataException("The JSON string `" + jsonString + "` cannot be deserialized into any schema defined.");
+            }
+            else if (match > 1)
+            {
+                throw new InvalidDataException("The JSON string `" + jsonString + "` incorrectly matches more than one schema (should be exactly one match): " + matchedTypes);
+            }
+
+            // deserialization is considered successful at this point if no exception has been thrown.
+            return newPolymorphicProperty;
+        }
+
+        /// <summary>
+        /// Returns true if objects are equal
+        /// </summary>
+        /// <param name="input">Object to be compared</param>
+        /// <returns>Boolean</returns>
+        public override bool Equals(object input)
+        {
+            return OpenAPIClientUtils.compareLogic.Compare(this, input as PolymorphicProperty).AreEqual;
+        }
+
+        /// <summary>
+        /// Returns true if PolymorphicProperty instances are equal
+        /// </summary>
+        /// <param name="input">Instance of PolymorphicProperty to be compared</param>
+        /// <returns>Boolean</returns>
+        public bool Equals(PolymorphicProperty input)
+        {
+            return OpenAPIClientUtils.compareLogic.Compare(this, input).AreEqual;
+        }
+
+        /// <summary>
+        /// Gets the hash code
+        /// </summary>
+        /// <returns>Hash code</returns>
+        public override int GetHashCode()
+        {
+            unchecked // Overflow is fine, just wrap
+            {
+                int hashCode = 41;
+                if (this.ActualInstance != null)
+                    hashCode = hashCode * 59 + this.ActualInstance.GetHashCode();
+                return hashCode;
+            }
+        }
+
+        /// <summary>
+        /// To validate all properties of the instance
+        /// </summary>
+        /// <param name="validationContext">Validation context</param>
+        /// <returns>Validation Result</returns>
+        IEnumerable<System.ComponentModel.DataAnnotations.ValidationResult> IValidatableObject.Validate(ValidationContext validationContext)
+        {
+            yield break;
+        }
+    }
+
+    /// <summary>
+    /// Custom JSON converter for PolymorphicProperty
+    /// </summary>
+    public class PolymorphicPropertyJsonConverter : JsonConverter
+    {
+        /// <summary>
+        /// To write the JSON string
+        /// </summary>
+        /// <param name="writer">JSON writer</param>
+        /// <param name="value">Object to be converted into a JSON string</param>
+        /// <param name="serializer">JSON Serializer</param>
+        public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
+        {
+            writer.WriteRawValue((string)(typeof(PolymorphicProperty).GetMethod("ToJson").Invoke(value, null)));
+        }
+
+        /// <summary>
+        /// To convert a JSON string into an object
+        /// </summary>
+        /// <param name="reader">JSON reader</param>
+        /// <param name="objectType">Object type</param>
+        /// <param name="existingValue">Existing value</param>
+        /// <param name="serializer">JSON Serializer</param>
+        /// <returns>The object converted from the JSON string</returns>
+        public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
+        {
+            if(reader.TokenType != JsonToken.Null)
+            {
+                return PolymorphicProperty.FromJson(JObject.Load(reader).ToString(Formatting.None));
+            }
+            return null;
+        }
+
+        /// <summary>
+        /// Check if the object can be converted
+        /// </summary>
+        /// <param name="objectType">Object type</param>
+        /// <returns>True if the object can be converted</returns>
+        public override bool CanConvert(Type objectType)
+        {
+            return false;
+        }
+    }
+
+}

samples/client/petstore/csharp-netcore/OpenAPIClient-net47/.openapi-generator/FILES

@@ -67,6 +67,7 @@ docs/ParentPet.md
 docs/Pet.md
 docs/PetApi.md
 docs/Pig.md
+docs/PolymorphicProperty.md
 docs/Quadrilateral.md
 docs/QuadrilateralInterface.md
 docs/ReadOnlyFirst.md
@@ -172,6 +173,7 @@ src/Org.OpenAPITools/Model/OuterEnumIntegerDefaultValue.cs
 src/Org.OpenAPITools/Model/ParentPet.cs
 src/Org.OpenAPITools/Model/Pet.cs
 src/Org.OpenAPITools/Model/Pig.cs
+src/Org.OpenAPITools/Model/PolymorphicProperty.cs
 src/Org.OpenAPITools/Model/Quadrilateral.cs
 src/Org.OpenAPITools/Model/QuadrilateralInterface.cs
 src/Org.OpenAPITools/Model/ReadOnlyFirst.cs

samples/client/petstore/csharp-netcore/OpenAPIClient-net47/README.md

@@ -219,6 +219,7 @@ Class | Method | HTTP request | Description
  - [Model.ParentPet](docs/ParentPet.md)
  - [Model.Pet](docs/Pet.md)
  - [Model.Pig](docs/Pig.md)
+ - [Model.PolymorphicProperty](docs/PolymorphicProperty.md)
  - [Model.Quadrilateral](docs/Quadrilateral.md)
  - [Model.QuadrilateralInterface](docs/QuadrilateralInterface.md)
  - [Model.ReadOnlyFirst](docs/ReadOnlyFirst.md)

samples/client/petstore/csharp-netcore/OpenAPIClient-net47/docs/PolymorphicProperty.md

@@ -0,0 +1,9 @@
+# Org.OpenAPITools.Model.PolymorphicProperty
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+

samples/client/petstore/csharp-netcore/OpenAPIClient-net47/src/Org.OpenAPITools.Test/Model/PolymorphicPropertyTests.cs

@@ -0,0 +1,62 @@
+/*
+ * OpenAPI Petstore
+ *
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * Generated by: https://github.com/openapitools/openapi-generator.git
+ */
+
+
+using Xunit;
+
+using System;
+using System.Linq;
+using System.IO;
+using System.Collections.Generic;
+using Org.OpenAPITools.Api;
+using Org.OpenAPITools.Model;
+using Org.OpenAPITools.Client;
+using System.Reflection;
+using Newtonsoft.Json;
+
+namespace Org.OpenAPITools.Test.Model
+{
+    /// <summary>
+    ///  Class for testing PolymorphicProperty
+    /// </summary>
+    /// <remarks>
+    /// This file is automatically generated by OpenAPI Generator (https://openapi-generator.tech).
+    /// Please update the test case below to test the model.
+    /// </remarks>
+    public class PolymorphicPropertyTests : IDisposable
+    {
+        // TODO uncomment below to declare an instance variable for PolymorphicProperty
+        //private PolymorphicProperty instance;
+
+        public PolymorphicPropertyTests()
+        {
+            // TODO uncomment below to create an instance of PolymorphicProperty
+            //instance = new PolymorphicProperty();
+        }
+
+        public void Dispose()
+        {
+            // Cleanup when everything is done.
+        }
+
+        /// <summary>
+        /// Test an instance of PolymorphicProperty
+        /// </summary>
+        [Fact]
+        public void PolymorphicPropertyInstanceTest()
+        {
+            // TODO uncomment below to test "IsType" PolymorphicProperty
+            //Assert.IsType<PolymorphicProperty>(instance);
+        }
+
+
+
+    }
+
+}

samples/client/petstore/csharp-netcore/OpenAPIClient-net47/src/Org.OpenAPITools/Model/PolymorphicProperty.cs

@@ -0,0 +1,383 @@
+/*
+ * OpenAPI Petstore
+ *
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * Generated by: https://github.com/openapitools/openapi-generator.git
+ */
+
+
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Linq;
+using System.IO;
+using System.Runtime.Serialization;
+using System.Text;
+using System.Text.RegularExpressions;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Converters;
+using Newtonsoft.Json.Linq;
+using System.ComponentModel.DataAnnotations;
+using OpenAPIDateConverter = Org.OpenAPITools.Client.OpenAPIDateConverter;
+using OpenAPIClientUtils = Org.OpenAPITools.Client.ClientUtils;
+using System.Reflection;
+
+namespace Org.OpenAPITools.Model
+{
+    /// <summary>
+    /// PolymorphicProperty
+    /// </summary>
+    [JsonConverter(typeof(PolymorphicPropertyJsonConverter))]
+    [DataContract(Name = "PolymorphicProperty")]
+    public partial class PolymorphicProperty : AbstractOpenAPISchema, IEquatable<PolymorphicProperty>, IValidatableObject
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="PolymorphicProperty" /> class
+        /// with the <see cref="bool" /> class
+        /// </summary>
+        /// <param name="actualInstance">An instance of bool.</param>
+        public PolymorphicProperty(bool actualInstance)
+        {
+            this.IsNullable = false;
+            this.SchemaType= "oneOf";
+            this.ActualInstance = actualInstance;
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="PolymorphicProperty" /> class
+        /// with the <see cref="string" /> class
+        /// </summary>
+        /// <param name="actualInstance">An instance of string.</param>
+        public PolymorphicProperty(string actualInstance)
+        {
+            this.IsNullable = false;
+            this.SchemaType= "oneOf";
+            this.ActualInstance = actualInstance ?? throw new ArgumentException("Invalid instance found. Must not be null.");
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="PolymorphicProperty" /> class
+        /// with the <see cref="Object" /> class
+        /// </summary>
+        /// <param name="actualInstance">An instance of Object.</param>
+        public PolymorphicProperty(Object actualInstance)
+        {
+            this.IsNullable = false;
+            this.SchemaType= "oneOf";
+            this.ActualInstance = actualInstance ?? throw new ArgumentException("Invalid instance found. Must not be null.");
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="PolymorphicProperty" /> class
+        /// with the <see cref="List&lt;string&gt;" /> class
+        /// </summary>
+        /// <param name="actualInstance">An instance of List&lt;string&gt;.</param>
+        public PolymorphicProperty(List<string> actualInstance)
+        {
+            this.IsNullable = false;
+            this.SchemaType= "oneOf";
+            this.ActualInstance = actualInstance ?? throw new ArgumentException("Invalid instance found. Must not be null.");
+        }
+
+
+        private Object _actualInstance;
+
+        /// <summary>
+        /// Gets or Sets ActualInstance
+        /// </summary>
+        public override Object ActualInstance
+        {
+            get
+            {
+                return _actualInstance;
+            }
+            set
+            {
+                if (value.GetType() == typeof(List<string>))
+                {
+                    this._actualInstance = value;
+                }
+                else if (value.GetType() == typeof(Object))
+                {
+                    this._actualInstance = value;
+                }
+                else if (value.GetType() == typeof(bool))
+                {
+                    this._actualInstance = value;
+                }
+                else if (value.GetType() == typeof(string))
+                {
+                    this._actualInstance = value;
+                }
+                else
+                {
+                    throw new ArgumentException("Invalid instance found. Must be the following types: List<string>, Object, bool, string");
+                }
+            }
+        }
+
+        /// <summary>
+        /// Get the actual instance of `bool`. If the actual instance is not `bool`,
+        /// the InvalidClassException will be thrown
+        /// </summary>
+        /// <returns>An instance of bool</returns>
+        public bool GetBool()
+        {
+            return (bool)this.ActualInstance;
+        }
+
+        /// <summary>
+        /// Get the actual instance of `string`. If the actual instance is not `string`,
+        /// the InvalidClassException will be thrown
+        /// </summary>
+        /// <returns>An instance of string</returns>
+        public string GetString()
+        {
+            return (string)this.ActualInstance;
+        }
+
+        /// <summary>
+        /// Get the actual instance of `Object`. If the actual instance is not `Object`,
+        /// the InvalidClassException will be thrown
+        /// </summary>
+        /// <returns>An instance of Object</returns>
+        public Object GetObject()
+        {
+            return (Object)this.ActualInstance;
+        }
+
+        /// <summary>
+        /// Get the actual instance of `List&lt;string&gt;`. If the actual instance is not `List&lt;string&gt;`,
+        /// the InvalidClassException will be thrown
+        /// </summary>
+        /// <returns>An instance of List&lt;string&gt;</returns>
+        public List<string> GetListString()
+        {
+            return (List<string>)this.ActualInstance;
+        }
+
+        /// <summary>
+        /// Returns the string presentation of the object
+        /// </summary>
+        /// <returns>String presentation of the object</returns>
+        public override string ToString()
+        {
+            var sb = new StringBuilder();
+            sb.Append("class PolymorphicProperty {\n");
+            sb.Append("  ActualInstance: ").Append(this.ActualInstance).Append("\n");
+            sb.Append("}\n");
+            return sb.ToString();
+        }
+
+        /// <summary>
+        /// Returns the JSON string presentation of the object
+        /// </summary>
+        /// <returns>JSON string presentation of the object</returns>
+        public override string ToJson()
+        {
+            return JsonConvert.SerializeObject(this.ActualInstance, PolymorphicProperty.SerializerSettings);
+        }
+
+        /// <summary>
+        /// Converts the JSON string into an instance of PolymorphicProperty
+        /// </summary>
+        /// <param name="jsonString">JSON string</param>
+        /// <returns>An instance of PolymorphicProperty</returns>
+        public static PolymorphicProperty FromJson(string jsonString)
+        {
+            PolymorphicProperty newPolymorphicProperty = null;
+
+            if (string.IsNullOrEmpty(jsonString))
+            {
+                return newPolymorphicProperty;
+            }
+            int match = 0;
+            List<string> matchedTypes = new List<string>();
+
+            try
+            {
+                // if it does not contains "AdditionalProperties", use SerializerSettings to deserialize
+                if (typeof(List<string>).GetProperty("AdditionalProperties") == null)
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<List<string>>(jsonString, PolymorphicProperty.SerializerSettings));
+                }
+                else
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<List<string>>(jsonString, PolymorphicProperty.AdditionalPropertiesSerializerSettings));
+                }
+                matchedTypes.Add("List<string>");
+                match++;
+            }
+            catch (Exception exception)
+            {
+                // deserialization failed, try the next one
+                System.Diagnostics.Debug.WriteLine(string.Format("Failed to deserialize `{0}` into List<string>: {1}", jsonString, exception.ToString()));
+            }
+
+            try
+            {
+                // if it does not contains "AdditionalProperties", use SerializerSettings to deserialize
+                if (typeof(Object).GetProperty("AdditionalProperties") == null)
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<Object>(jsonString, PolymorphicProperty.SerializerSettings));
+                }
+                else
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<Object>(jsonString, PolymorphicProperty.AdditionalPropertiesSerializerSettings));
+                }
+                matchedTypes.Add("Object");
+                match++;
+            }
+            catch (Exception exception)
+            {
+                // deserialization failed, try the next one
+                System.Diagnostics.Debug.WriteLine(string.Format("Failed to deserialize `{0}` into Object: {1}", jsonString, exception.ToString()));
+            }
+
+            try
+            {
+                // if it does not contains "AdditionalProperties", use SerializerSettings to deserialize
+                if (typeof(bool).GetProperty("AdditionalProperties") == null)
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<bool>(jsonString, PolymorphicProperty.SerializerSettings));
+                }
+                else
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<bool>(jsonString, PolymorphicProperty.AdditionalPropertiesSerializerSettings));
+                }
+                matchedTypes.Add("bool");
+                match++;
+            }
+            catch (Exception exception)
+            {
+                // deserialization failed, try the next one
+                System.Diagnostics.Debug.WriteLine(string.Format("Failed to deserialize `{0}` into bool: {1}", jsonString, exception.ToString()));
+            }
+
+            try
+            {
+                // if it does not contains "AdditionalProperties", use SerializerSettings to deserialize
+                if (typeof(string).GetProperty("AdditionalProperties") == null)
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<string>(jsonString, PolymorphicProperty.SerializerSettings));
+                }
+                else
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<string>(jsonString, PolymorphicProperty.AdditionalPropertiesSerializerSettings));
+                }
+                matchedTypes.Add("string");
+                match++;
+            }
+            catch (Exception exception)
+            {
+                // deserialization failed, try the next one
+                System.Diagnostics.Debug.WriteLine(string.Format("Failed to deserialize `{0}` into string: {1}", jsonString, exception.ToString()));
+            }
+
+            if (match == 0)
+            {
+                throw new InvalidDataException("The JSON string `" + jsonString + "` cannot be deserialized into any schema defined.");
+            }
+            else if (match > 1)
+            {
+                throw new InvalidDataException("The JSON string `" + jsonString + "` incorrectly matches more than one schema (should be exactly one match): " + matchedTypes);
+            }
+
+            // deserialization is considered successful at this point if no exception has been thrown.
+            return newPolymorphicProperty;
+        }
+
+        /// <summary>
+        /// Returns true if objects are equal
+        /// </summary>
+        /// <param name="input">Object to be compared</param>
+        /// <returns>Boolean</returns>
+        public override bool Equals(object input)
+        {
+            return OpenAPIClientUtils.compareLogic.Compare(this, input as PolymorphicProperty).AreEqual;
+        }
+
+        /// <summary>
+        /// Returns true if PolymorphicProperty instances are equal
+        /// </summary>
+        /// <param name="input">Instance of PolymorphicProperty to be compared</param>
+        /// <returns>Boolean</returns>
+        public bool Equals(PolymorphicProperty input)
+        {
+            return OpenAPIClientUtils.compareLogic.Compare(this, input).AreEqual;
+        }
+
+        /// <summary>
+        /// Gets the hash code
+        /// </summary>
+        /// <returns>Hash code</returns>
+        public override int GetHashCode()
+        {
+            unchecked // Overflow is fine, just wrap
+            {
+                int hashCode = 41;
+                if (this.ActualInstance != null)
+                    hashCode = hashCode * 59 + this.ActualInstance.GetHashCode();
+                return hashCode;
+            }
+        }
+
+        /// <summary>
+        /// To validate all properties of the instance
+        /// </summary>
+        /// <param name="validationContext">Validation context</param>
+        /// <returns>Validation Result</returns>
+        IEnumerable<System.ComponentModel.DataAnnotations.ValidationResult> IValidatableObject.Validate(ValidationContext validationContext)
+        {
+            yield break;
+        }
+    }
+
+    /// <summary>
+    /// Custom JSON converter for PolymorphicProperty
+    /// </summary>
+    public class PolymorphicPropertyJsonConverter : JsonConverter
+    {
+        /// <summary>
+        /// To write the JSON string
+        /// </summary>
+        /// <param name="writer">JSON writer</param>
+        /// <param name="value">Object to be converted into a JSON string</param>
+        /// <param name="serializer">JSON Serializer</param>
+        public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
+        {
+            writer.WriteRawValue((string)(typeof(PolymorphicProperty).GetMethod("ToJson").Invoke(value, null)));
+        }
+
+        /// <summary>
+        /// To convert a JSON string into an object
+        /// </summary>
+        /// <param name="reader">JSON reader</param>
+        /// <param name="objectType">Object type</param>
+        /// <param name="existingValue">Existing value</param>
+        /// <param name="serializer">JSON Serializer</param>
+        /// <returns>The object converted from the JSON string</returns>
+        public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
+        {
+            if(reader.TokenType != JsonToken.Null)
+            {
+                return PolymorphicProperty.FromJson(JObject.Load(reader).ToString(Formatting.None));
+            }
+            return null;
+        }
+
+        /// <summary>
+        /// Check if the object can be converted
+        /// </summary>
+        /// <param name="objectType">Object type</param>
+        /// <returns>True if the object can be converted</returns>
+        public override bool CanConvert(Type objectType)
+        {
+            return false;
+        }
+    }
+
+}

samples/client/petstore/csharp-netcore/OpenAPIClient-net5.0/.openapi-generator/FILES

@@ -67,6 +67,7 @@ docs/ParentPet.md
 docs/Pet.md
 docs/PetApi.md
 docs/Pig.md
+docs/PolymorphicProperty.md
 docs/Quadrilateral.md
 docs/QuadrilateralInterface.md
 docs/ReadOnlyFirst.md
@@ -172,6 +173,7 @@ src/Org.OpenAPITools/Model/OuterEnumIntegerDefaultValue.cs
 src/Org.OpenAPITools/Model/ParentPet.cs
 src/Org.OpenAPITools/Model/Pet.cs
 src/Org.OpenAPITools/Model/Pig.cs
+src/Org.OpenAPITools/Model/PolymorphicProperty.cs
 src/Org.OpenAPITools/Model/Quadrilateral.cs
 src/Org.OpenAPITools/Model/QuadrilateralInterface.cs
 src/Org.OpenAPITools/Model/ReadOnlyFirst.cs

samples/client/petstore/csharp-netcore/OpenAPIClient-net5.0/README.md

@@ -219,6 +219,7 @@ Class | Method | HTTP request | Description
  - [Model.ParentPet](docs/ParentPet.md)
  - [Model.Pet](docs/Pet.md)
  - [Model.Pig](docs/Pig.md)
+ - [Model.PolymorphicProperty](docs/PolymorphicProperty.md)
  - [Model.Quadrilateral](docs/Quadrilateral.md)
  - [Model.QuadrilateralInterface](docs/QuadrilateralInterface.md)
  - [Model.ReadOnlyFirst](docs/ReadOnlyFirst.md)

samples/client/petstore/csharp-netcore/OpenAPIClient-net5.0/docs/PolymorphicProperty.md

@@ -0,0 +1,9 @@
+# Org.OpenAPITools.Model.PolymorphicProperty
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+

samples/client/petstore/csharp-netcore/OpenAPIClient-net5.0/src/Org.OpenAPITools.Test/Model/PolymorphicPropertyTests.cs

@@ -0,0 +1,62 @@
+/*
+ * OpenAPI Petstore
+ *
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * Generated by: https://github.com/openapitools/openapi-generator.git
+ */
+
+
+using Xunit;
+
+using System;
+using System.Linq;
+using System.IO;
+using System.Collections.Generic;
+using Org.OpenAPITools.Api;
+using Org.OpenAPITools.Model;
+using Org.OpenAPITools.Client;
+using System.Reflection;
+using Newtonsoft.Json;
+
+namespace Org.OpenAPITools.Test.Model
+{
+    /// <summary>
+    ///  Class for testing PolymorphicProperty
+    /// </summary>
+    /// <remarks>
+    /// This file is automatically generated by OpenAPI Generator (https://openapi-generator.tech).
+    /// Please update the test case below to test the model.
+    /// </remarks>
+    public class PolymorphicPropertyTests : IDisposable
+    {
+        // TODO uncomment below to declare an instance variable for PolymorphicProperty
+        //private PolymorphicProperty instance;
+
+        public PolymorphicPropertyTests()
+        {
+            // TODO uncomment below to create an instance of PolymorphicProperty
+            //instance = new PolymorphicProperty();
+        }
+
+        public void Dispose()
+        {
+            // Cleanup when everything is done.
+        }
+
+        /// <summary>
+        /// Test an instance of PolymorphicProperty
+        /// </summary>
+        [Fact]
+        public void PolymorphicPropertyInstanceTest()
+        {
+            // TODO uncomment below to test "IsType" PolymorphicProperty
+            //Assert.IsType<PolymorphicProperty>(instance);
+        }
+
+
+
+    }
+
+}

samples/client/petstore/csharp-netcore/OpenAPIClient-net5.0/src/Org.OpenAPITools/Model/PolymorphicProperty.cs

@@ -0,0 +1,383 @@
+/*
+ * OpenAPI Petstore
+ *
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * Generated by: https://github.com/openapitools/openapi-generator.git
+ */
+
+
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Linq;
+using System.IO;
+using System.Runtime.Serialization;
+using System.Text;
+using System.Text.RegularExpressions;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Converters;
+using Newtonsoft.Json.Linq;
+using System.ComponentModel.DataAnnotations;
+using OpenAPIDateConverter = Org.OpenAPITools.Client.OpenAPIDateConverter;
+using OpenAPIClientUtils = Org.OpenAPITools.Client.ClientUtils;
+using System.Reflection;
+
+namespace Org.OpenAPITools.Model
+{
+    /// <summary>
+    /// PolymorphicProperty
+    /// </summary>
+    [JsonConverter(typeof(PolymorphicPropertyJsonConverter))]
+    [DataContract(Name = "PolymorphicProperty")]
+    public partial class PolymorphicProperty : AbstractOpenAPISchema, IEquatable<PolymorphicProperty>, IValidatableObject
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="PolymorphicProperty" /> class
+        /// with the <see cref="bool" /> class
+        /// </summary>
+        /// <param name="actualInstance">An instance of bool.</param>
+        public PolymorphicProperty(bool actualInstance)
+        {
+            this.IsNullable = false;
+            this.SchemaType= "oneOf";
+            this.ActualInstance = actualInstance;
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="PolymorphicProperty" /> class
+        /// with the <see cref="string" /> class
+        /// </summary>
+        /// <param name="actualInstance">An instance of string.</param>
+        public PolymorphicProperty(string actualInstance)
+        {
+            this.IsNullable = false;
+            this.SchemaType= "oneOf";
+            this.ActualInstance = actualInstance ?? throw new ArgumentException("Invalid instance found. Must not be null.");
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="PolymorphicProperty" /> class
+        /// with the <see cref="Object" /> class
+        /// </summary>
+        /// <param name="actualInstance">An instance of Object.</param>
+        public PolymorphicProperty(Object actualInstance)
+        {
+            this.IsNullable = false;
+            this.SchemaType= "oneOf";
+            this.ActualInstance = actualInstance ?? throw new ArgumentException("Invalid instance found. Must not be null.");
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="PolymorphicProperty" /> class
+        /// with the <see cref="List&lt;string&gt;" /> class
+        /// </summary>
+        /// <param name="actualInstance">An instance of List&lt;string&gt;.</param>
+        public PolymorphicProperty(List<string> actualInstance)
+        {
+            this.IsNullable = false;
+            this.SchemaType= "oneOf";
+            this.ActualInstance = actualInstance ?? throw new ArgumentException("Invalid instance found. Must not be null.");
+        }
+
+
+        private Object _actualInstance;
+
+        /// <summary>
+        /// Gets or Sets ActualInstance
+        /// </summary>
+        public override Object ActualInstance
+        {
+            get
+            {
+                return _actualInstance;
+            }
+            set
+            {
+                if (value.GetType() == typeof(List<string>))
+                {
+                    this._actualInstance = value;
+                }
+                else if (value.GetType() == typeof(Object))
+                {
+                    this._actualInstance = value;
+                }
+                else if (value.GetType() == typeof(bool))
+                {
+                    this._actualInstance = value;
+                }
+                else if (value.GetType() == typeof(string))
+                {
+                    this._actualInstance = value;
+                }
+                else
+                {
+                    throw new ArgumentException("Invalid instance found. Must be the following types: List<string>, Object, bool, string");
+                }
+            }
+        }
+
+        /// <summary>
+        /// Get the actual instance of `bool`. If the actual instance is not `bool`,
+        /// the InvalidClassException will be thrown
+        /// </summary>
+        /// <returns>An instance of bool</returns>
+        public bool GetBool()
+        {
+            return (bool)this.ActualInstance;
+        }
+
+        /// <summary>
+        /// Get the actual instance of `string`. If the actual instance is not `string`,
+        /// the InvalidClassException will be thrown
+        /// </summary>
+        /// <returns>An instance of string</returns>
+        public string GetString()
+        {
+            return (string)this.ActualInstance;
+        }
+
+        /// <summary>
+        /// Get the actual instance of `Object`. If the actual instance is not `Object`,
+        /// the InvalidClassException will be thrown
+        /// </summary>
+        /// <returns>An instance of Object</returns>
+        public Object GetObject()
+        {
+            return (Object)this.ActualInstance;
+        }
+
+        /// <summary>
+        /// Get the actual instance of `List&lt;string&gt;`. If the actual instance is not `List&lt;string&gt;`,
+        /// the InvalidClassException will be thrown
+        /// </summary>
+        /// <returns>An instance of List&lt;string&gt;</returns>
+        public List<string> GetListString()
+        {
+            return (List<string>)this.ActualInstance;
+        }
+
+        /// <summary>
+        /// Returns the string presentation of the object
+        /// </summary>
+        /// <returns>String presentation of the object</returns>
+        public override string ToString()
+        {
+            var sb = new StringBuilder();
+            sb.Append("class PolymorphicProperty {\n");
+            sb.Append("  ActualInstance: ").Append(this.ActualInstance).Append("\n");
+            sb.Append("}\n");
+            return sb.ToString();
+        }
+
+        /// <summary>
+        /// Returns the JSON string presentation of the object
+        /// </summary>
+        /// <returns>JSON string presentation of the object</returns>
+        public override string ToJson()
+        {
+            return JsonConvert.SerializeObject(this.ActualInstance, PolymorphicProperty.SerializerSettings);
+        }
+
+        /// <summary>
+        /// Converts the JSON string into an instance of PolymorphicProperty
+        /// </summary>
+        /// <param name="jsonString">JSON string</param>
+        /// <returns>An instance of PolymorphicProperty</returns>
+        public static PolymorphicProperty FromJson(string jsonString)
+        {
+            PolymorphicProperty newPolymorphicProperty = null;
+
+            if (string.IsNullOrEmpty(jsonString))
+            {
+                return newPolymorphicProperty;
+            }
+            int match = 0;
+            List<string> matchedTypes = new List<string>();
+
+            try
+            {
+                // if it does not contains "AdditionalProperties", use SerializerSettings to deserialize
+                if (typeof(List<string>).GetProperty("AdditionalProperties") == null)
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<List<string>>(jsonString, PolymorphicProperty.SerializerSettings));
+                }
+                else
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<List<string>>(jsonString, PolymorphicProperty.AdditionalPropertiesSerializerSettings));
+                }
+                matchedTypes.Add("List<string>");
+                match++;
+            }
+            catch (Exception exception)
+            {
+                // deserialization failed, try the next one
+                System.Diagnostics.Debug.WriteLine(string.Format("Failed to deserialize `{0}` into List<string>: {1}", jsonString, exception.ToString()));
+            }
+
+            try
+            {
+                // if it does not contains "AdditionalProperties", use SerializerSettings to deserialize
+                if (typeof(Object).GetProperty("AdditionalProperties") == null)
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<Object>(jsonString, PolymorphicProperty.SerializerSettings));
+                }
+                else
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<Object>(jsonString, PolymorphicProperty.AdditionalPropertiesSerializerSettings));
+                }
+                matchedTypes.Add("Object");
+                match++;
+            }
+            catch (Exception exception)
+            {
+                // deserialization failed, try the next one
+                System.Diagnostics.Debug.WriteLine(string.Format("Failed to deserialize `{0}` into Object: {1}", jsonString, exception.ToString()));
+            }
+
+            try
+            {
+                // if it does not contains "AdditionalProperties", use SerializerSettings to deserialize
+                if (typeof(bool).GetProperty("AdditionalProperties") == null)
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<bool>(jsonString, PolymorphicProperty.SerializerSettings));
+                }
+                else
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<bool>(jsonString, PolymorphicProperty.AdditionalPropertiesSerializerSettings));
+                }
+                matchedTypes.Add("bool");
+                match++;
+            }
+            catch (Exception exception)
+            {
+                // deserialization failed, try the next one
+                System.Diagnostics.Debug.WriteLine(string.Format("Failed to deserialize `{0}` into bool: {1}", jsonString, exception.ToString()));
+            }
+
+            try
+            {
+                // if it does not contains "AdditionalProperties", use SerializerSettings to deserialize
+                if (typeof(string).GetProperty("AdditionalProperties") == null)
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<string>(jsonString, PolymorphicProperty.SerializerSettings));
+                }
+                else
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<string>(jsonString, PolymorphicProperty.AdditionalPropertiesSerializerSettings));
+                }
+                matchedTypes.Add("string");
+                match++;
+            }
+            catch (Exception exception)
+            {
+                // deserialization failed, try the next one
+                System.Diagnostics.Debug.WriteLine(string.Format("Failed to deserialize `{0}` into string: {1}", jsonString, exception.ToString()));
+            }
+
+            if (match == 0)
+            {
+                throw new InvalidDataException("The JSON string `" + jsonString + "` cannot be deserialized into any schema defined.");
+            }
+            else if (match > 1)
+            {
+                throw new InvalidDataException("The JSON string `" + jsonString + "` incorrectly matches more than one schema (should be exactly one match): " + matchedTypes);
+            }
+
+            // deserialization is considered successful at this point if no exception has been thrown.
+            return newPolymorphicProperty;
+        }
+
+        /// <summary>
+        /// Returns true if objects are equal
+        /// </summary>
+        /// <param name="input">Object to be compared</param>
+        /// <returns>Boolean</returns>
+        public override bool Equals(object input)
+        {
+            return OpenAPIClientUtils.compareLogic.Compare(this, input as PolymorphicProperty).AreEqual;
+        }
+
+        /// <summary>
+        /// Returns true if PolymorphicProperty instances are equal
+        /// </summary>
+        /// <param name="input">Instance of PolymorphicProperty to be compared</param>
+        /// <returns>Boolean</returns>
+        public bool Equals(PolymorphicProperty input)
+        {
+            return OpenAPIClientUtils.compareLogic.Compare(this, input).AreEqual;
+        }
+
+        /// <summary>
+        /// Gets the hash code
+        /// </summary>
+        /// <returns>Hash code</returns>
+        public override int GetHashCode()
+        {
+            unchecked // Overflow is fine, just wrap
+            {
+                int hashCode = 41;
+                if (this.ActualInstance != null)
+                    hashCode = hashCode * 59 + this.ActualInstance.GetHashCode();
+                return hashCode;
+            }
+        }
+
+        /// <summary>
+        /// To validate all properties of the instance
+        /// </summary>
+        /// <param name="validationContext">Validation context</param>
+        /// <returns>Validation Result</returns>
+        IEnumerable<System.ComponentModel.DataAnnotations.ValidationResult> IValidatableObject.Validate(ValidationContext validationContext)
+        {
+            yield break;
+        }
+    }
+
+    /// <summary>
+    /// Custom JSON converter for PolymorphicProperty
+    /// </summary>
+    public class PolymorphicPropertyJsonConverter : JsonConverter
+    {
+        /// <summary>
+        /// To write the JSON string
+        /// </summary>
+        /// <param name="writer">JSON writer</param>
+        /// <param name="value">Object to be converted into a JSON string</param>
+        /// <param name="serializer">JSON Serializer</param>
+        public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
+        {
+            writer.WriteRawValue((string)(typeof(PolymorphicProperty).GetMethod("ToJson").Invoke(value, null)));
+        }
+
+        /// <summary>
+        /// To convert a JSON string into an object
+        /// </summary>
+        /// <param name="reader">JSON reader</param>
+        /// <param name="objectType">Object type</param>
+        /// <param name="existingValue">Existing value</param>
+        /// <param name="serializer">JSON Serializer</param>
+        /// <returns>The object converted from the JSON string</returns>
+        public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
+        {
+            if(reader.TokenType != JsonToken.Null)
+            {
+                return PolymorphicProperty.FromJson(JObject.Load(reader).ToString(Formatting.None));
+            }
+            return null;
+        }
+
+        /// <summary>
+        /// Check if the object can be converted
+        /// </summary>
+        /// <param name="objectType">Object type</param>
+        /// <returns>True if the object can be converted</returns>
+        public override bool CanConvert(Type objectType)
+        {
+            return false;
+        }
+    }
+
+}

samples/client/petstore/csharp-netcore/OpenAPIClient/.openapi-generator/FILES

@@ -67,6 +67,7 @@ docs/ParentPet.md
 docs/Pet.md
 docs/PetApi.md
 docs/Pig.md
+docs/PolymorphicProperty.md
 docs/Quadrilateral.md
 docs/QuadrilateralInterface.md
 docs/ReadOnlyFirst.md
@@ -171,6 +172,7 @@ src/Org.OpenAPITools/Model/OuterEnumIntegerDefaultValue.cs
 src/Org.OpenAPITools/Model/ParentPet.cs
 src/Org.OpenAPITools/Model/Pet.cs
 src/Org.OpenAPITools/Model/Pig.cs
+src/Org.OpenAPITools/Model/PolymorphicProperty.cs
 src/Org.OpenAPITools/Model/Quadrilateral.cs
 src/Org.OpenAPITools/Model/QuadrilateralInterface.cs
 src/Org.OpenAPITools/Model/ReadOnlyFirst.cs

samples/client/petstore/csharp-netcore/OpenAPIClient/README.md

@@ -207,6 +207,7 @@ Class | Method | HTTP request | Description
  - [Model.ParentPet](docs/ParentPet.md)
  - [Model.Pet](docs/Pet.md)
  - [Model.Pig](docs/Pig.md)
+ - [Model.PolymorphicProperty](docs/PolymorphicProperty.md)
  - [Model.Quadrilateral](docs/Quadrilateral.md)
  - [Model.QuadrilateralInterface](docs/QuadrilateralInterface.md)
  - [Model.ReadOnlyFirst](docs/ReadOnlyFirst.md)

samples/client/petstore/csharp-netcore/OpenAPIClient/docs/PolymorphicProperty.md

@@ -0,0 +1,9 @@
+# Org.OpenAPITools.Model.PolymorphicProperty
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+

samples/client/petstore/csharp-netcore/OpenAPIClient/src/Org.OpenAPITools.Test/Model/PolymorphicPropertyTests.cs

@@ -0,0 +1,62 @@
+/*
+ * OpenAPI Petstore
+ *
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * Generated by: https://github.com/openapitools/openapi-generator.git
+ */
+
+
+using Xunit;
+
+using System;
+using System.Linq;
+using System.IO;
+using System.Collections.Generic;
+using Org.OpenAPITools.Api;
+using Org.OpenAPITools.Model;
+using Org.OpenAPITools.Client;
+using System.Reflection;
+using Newtonsoft.Json;
+
+namespace Org.OpenAPITools.Test.Model
+{
+    /// <summary>
+    ///  Class for testing PolymorphicProperty
+    /// </summary>
+    /// <remarks>
+    /// This file is automatically generated by OpenAPI Generator (https://openapi-generator.tech).
+    /// Please update the test case below to test the model.
+    /// </remarks>
+    public class PolymorphicPropertyTests : IDisposable
+    {
+        // TODO uncomment below to declare an instance variable for PolymorphicProperty
+        //private PolymorphicProperty instance;
+
+        public PolymorphicPropertyTests()
+        {
+            // TODO uncomment below to create an instance of PolymorphicProperty
+            //instance = new PolymorphicProperty();
+        }
+
+        public void Dispose()
+        {
+            // Cleanup when everything is done.
+        }
+
+        /// <summary>
+        /// Test an instance of PolymorphicProperty
+        /// </summary>
+        [Fact]
+        public void PolymorphicPropertyInstanceTest()
+        {
+            // TODO uncomment below to test "IsType" PolymorphicProperty
+            //Assert.IsType<PolymorphicProperty>(instance);
+        }
+
+
+
+    }
+
+}

samples/client/petstore/csharp-netcore/OpenAPIClient/src/Org.OpenAPITools/Model/PolymorphicProperty.cs

@@ -0,0 +1,383 @@
+/*
+ * OpenAPI Petstore
+ *
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * Generated by: https://github.com/openapitools/openapi-generator.git
+ */
+
+
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Linq;
+using System.IO;
+using System.Runtime.Serialization;
+using System.Text;
+using System.Text.RegularExpressions;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Converters;
+using Newtonsoft.Json.Linq;
+using System.ComponentModel.DataAnnotations;
+using OpenAPIDateConverter = Org.OpenAPITools.Client.OpenAPIDateConverter;
+using OpenAPIClientUtils = Org.OpenAPITools.Client.ClientUtils;
+using System.Reflection;
+
+namespace Org.OpenAPITools.Model
+{
+    /// <summary>
+    /// PolymorphicProperty
+    /// </summary>
+    [JsonConverter(typeof(PolymorphicPropertyJsonConverter))]
+    [DataContract(Name = "PolymorphicProperty")]
+    public partial class PolymorphicProperty : AbstractOpenAPISchema, IEquatable<PolymorphicProperty>, IValidatableObject
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="PolymorphicProperty" /> class
+        /// with the <see cref="bool" /> class
+        /// </summary>
+        /// <param name="actualInstance">An instance of bool.</param>
+        public PolymorphicProperty(bool actualInstance)
+        {
+            this.IsNullable = false;
+            this.SchemaType= "oneOf";
+            this.ActualInstance = actualInstance;
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="PolymorphicProperty" /> class
+        /// with the <see cref="string" /> class
+        /// </summary>
+        /// <param name="actualInstance">An instance of string.</param>
+        public PolymorphicProperty(string actualInstance)
+        {
+            this.IsNullable = false;
+            this.SchemaType= "oneOf";
+            this.ActualInstance = actualInstance ?? throw new ArgumentException("Invalid instance found. Must not be null.");
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="PolymorphicProperty" /> class
+        /// with the <see cref="Object" /> class
+        /// </summary>
+        /// <param name="actualInstance">An instance of Object.</param>
+        public PolymorphicProperty(Object actualInstance)
+        {
+            this.IsNullable = false;
+            this.SchemaType= "oneOf";
+            this.ActualInstance = actualInstance ?? throw new ArgumentException("Invalid instance found. Must not be null.");
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="PolymorphicProperty" /> class
+        /// with the <see cref="List&lt;string&gt;" /> class
+        /// </summary>
+        /// <param name="actualInstance">An instance of List&lt;string&gt;.</param>
+        public PolymorphicProperty(List<string> actualInstance)
+        {
+            this.IsNullable = false;
+            this.SchemaType= "oneOf";
+            this.ActualInstance = actualInstance ?? throw new ArgumentException("Invalid instance found. Must not be null.");
+        }
+
+
+        private Object _actualInstance;
+
+        /// <summary>
+        /// Gets or Sets ActualInstance
+        /// </summary>
+        public override Object ActualInstance
+        {
+            get
+            {
+                return _actualInstance;
+            }
+            set
+            {
+                if (value.GetType() == typeof(List<string>))
+                {
+                    this._actualInstance = value;
+                }
+                else if (value.GetType() == typeof(Object))
+                {
+                    this._actualInstance = value;
+                }
+                else if (value.GetType() == typeof(bool))
+                {
+                    this._actualInstance = value;
+                }
+                else if (value.GetType() == typeof(string))
+                {
+                    this._actualInstance = value;
+                }
+                else
+                {
+                    throw new ArgumentException("Invalid instance found. Must be the following types: List<string>, Object, bool, string");
+                }
+            }
+        }
+
+        /// <summary>
+        /// Get the actual instance of `bool`. If the actual instance is not `bool`,
+        /// the InvalidClassException will be thrown
+        /// </summary>
+        /// <returns>An instance of bool</returns>
+        public bool GetBool()
+        {
+            return (bool)this.ActualInstance;
+        }
+
+        /// <summary>
+        /// Get the actual instance of `string`. If the actual instance is not `string`,
+        /// the InvalidClassException will be thrown
+        /// </summary>
+        /// <returns>An instance of string</returns>
+        public string GetString()
+        {
+            return (string)this.ActualInstance;
+        }
+
+        /// <summary>
+        /// Get the actual instance of `Object`. If the actual instance is not `Object`,
+        /// the InvalidClassException will be thrown
+        /// </summary>
+        /// <returns>An instance of Object</returns>
+        public Object GetObject()
+        {
+            return (Object)this.ActualInstance;
+        }
+
+        /// <summary>
+        /// Get the actual instance of `List&lt;string&gt;`. If the actual instance is not `List&lt;string&gt;`,
+        /// the InvalidClassException will be thrown
+        /// </summary>
+        /// <returns>An instance of List&lt;string&gt;</returns>
+        public List<string> GetListString()
+        {
+            return (List<string>)this.ActualInstance;
+        }
+
+        /// <summary>
+        /// Returns the string presentation of the object
+        /// </summary>
+        /// <returns>String presentation of the object</returns>
+        public override string ToString()
+        {
+            var sb = new StringBuilder();
+            sb.Append("class PolymorphicProperty {\n");
+            sb.Append("  ActualInstance: ").Append(this.ActualInstance).Append("\n");
+            sb.Append("}\n");
+            return sb.ToString();
+        }
+
+        /// <summary>
+        /// Returns the JSON string presentation of the object
+        /// </summary>
+        /// <returns>JSON string presentation of the object</returns>
+        public override string ToJson()
+        {
+            return JsonConvert.SerializeObject(this.ActualInstance, PolymorphicProperty.SerializerSettings);
+        }
+
+        /// <summary>
+        /// Converts the JSON string into an instance of PolymorphicProperty
+        /// </summary>
+        /// <param name="jsonString">JSON string</param>
+        /// <returns>An instance of PolymorphicProperty</returns>
+        public static PolymorphicProperty FromJson(string jsonString)
+        {
+            PolymorphicProperty newPolymorphicProperty = null;
+
+            if (string.IsNullOrEmpty(jsonString))
+            {
+                return newPolymorphicProperty;
+            }
+            int match = 0;
+            List<string> matchedTypes = new List<string>();
+
+            try
+            {
+                // if it does not contains "AdditionalProperties", use SerializerSettings to deserialize
+                if (typeof(List<string>).GetProperty("AdditionalProperties") == null)
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<List<string>>(jsonString, PolymorphicProperty.SerializerSettings));
+                }
+                else
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<List<string>>(jsonString, PolymorphicProperty.AdditionalPropertiesSerializerSettings));
+                }
+                matchedTypes.Add("List<string>");
+                match++;
+            }
+            catch (Exception exception)
+            {
+                // deserialization failed, try the next one
+                System.Diagnostics.Debug.WriteLine(string.Format("Failed to deserialize `{0}` into List<string>: {1}", jsonString, exception.ToString()));
+            }
+
+            try
+            {
+                // if it does not contains "AdditionalProperties", use SerializerSettings to deserialize
+                if (typeof(Object).GetProperty("AdditionalProperties") == null)
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<Object>(jsonString, PolymorphicProperty.SerializerSettings));
+                }
+                else
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<Object>(jsonString, PolymorphicProperty.AdditionalPropertiesSerializerSettings));
+                }
+                matchedTypes.Add("Object");
+                match++;
+            }
+            catch (Exception exception)
+            {
+                // deserialization failed, try the next one
+                System.Diagnostics.Debug.WriteLine(string.Format("Failed to deserialize `{0}` into Object: {1}", jsonString, exception.ToString()));
+            }
+
+            try
+            {
+                // if it does not contains "AdditionalProperties", use SerializerSettings to deserialize
+                if (typeof(bool).GetProperty("AdditionalProperties") == null)
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<bool>(jsonString, PolymorphicProperty.SerializerSettings));
+                }
+                else
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<bool>(jsonString, PolymorphicProperty.AdditionalPropertiesSerializerSettings));
+                }
+                matchedTypes.Add("bool");
+                match++;
+            }
+            catch (Exception exception)
+            {
+                // deserialization failed, try the next one
+                System.Diagnostics.Debug.WriteLine(string.Format("Failed to deserialize `{0}` into bool: {1}", jsonString, exception.ToString()));
+            }
+
+            try
+            {
+                // if it does not contains "AdditionalProperties", use SerializerSettings to deserialize
+                if (typeof(string).GetProperty("AdditionalProperties") == null)
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<string>(jsonString, PolymorphicProperty.SerializerSettings));
+                }
+                else
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<string>(jsonString, PolymorphicProperty.AdditionalPropertiesSerializerSettings));
+                }
+                matchedTypes.Add("string");
+                match++;
+            }
+            catch (Exception exception)
+            {
+                // deserialization failed, try the next one
+                System.Diagnostics.Debug.WriteLine(string.Format("Failed to deserialize `{0}` into string: {1}", jsonString, exception.ToString()));
+            }
+
+            if (match == 0)
+            {
+                throw new InvalidDataException("The JSON string `" + jsonString + "` cannot be deserialized into any schema defined.");
+            }
+            else if (match > 1)
+            {
+                throw new InvalidDataException("The JSON string `" + jsonString + "` incorrectly matches more than one schema (should be exactly one match): " + matchedTypes);
+            }
+
+            // deserialization is considered successful at this point if no exception has been thrown.
+            return newPolymorphicProperty;
+        }
+
+        /// <summary>
+        /// Returns true if objects are equal
+        /// </summary>
+        /// <param name="input">Object to be compared</param>
+        /// <returns>Boolean</returns>
+        public override bool Equals(object input)
+        {
+            return OpenAPIClientUtils.compareLogic.Compare(this, input as PolymorphicProperty).AreEqual;
+        }
+
+        /// <summary>
+        /// Returns true if PolymorphicProperty instances are equal
+        /// </summary>
+        /// <param name="input">Instance of PolymorphicProperty to be compared</param>
+        /// <returns>Boolean</returns>
+        public bool Equals(PolymorphicProperty input)
+        {
+            return OpenAPIClientUtils.compareLogic.Compare(this, input).AreEqual;
+        }
+
+        /// <summary>
+        /// Gets the hash code
+        /// </summary>
+        /// <returns>Hash code</returns>
+        public override int GetHashCode()
+        {
+            unchecked // Overflow is fine, just wrap
+            {
+                int hashCode = 41;
+                if (this.ActualInstance != null)
+                    hashCode = hashCode * 59 + this.ActualInstance.GetHashCode();
+                return hashCode;
+            }
+        }
+
+        /// <summary>
+        /// To validate all properties of the instance
+        /// </summary>
+        /// <param name="validationContext">Validation context</param>
+        /// <returns>Validation Result</returns>
+        IEnumerable<System.ComponentModel.DataAnnotations.ValidationResult> IValidatableObject.Validate(ValidationContext validationContext)
+        {
+            yield break;
+        }
+    }
+
+    /// <summary>
+    /// Custom JSON converter for PolymorphicProperty
+    /// </summary>
+    public class PolymorphicPropertyJsonConverter : JsonConverter
+    {
+        /// <summary>
+        /// To write the JSON string
+        /// </summary>
+        /// <param name="writer">JSON writer</param>
+        /// <param name="value">Object to be converted into a JSON string</param>
+        /// <param name="serializer">JSON Serializer</param>
+        public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
+        {
+            writer.WriteRawValue((string)(typeof(PolymorphicProperty).GetMethod("ToJson").Invoke(value, null)));
+        }
+
+        /// <summary>
+        /// To convert a JSON string into an object
+        /// </summary>
+        /// <param name="reader">JSON reader</param>
+        /// <param name="objectType">Object type</param>
+        /// <param name="existingValue">Existing value</param>
+        /// <param name="serializer">JSON Serializer</param>
+        /// <returns>The object converted from the JSON string</returns>
+        public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
+        {
+            if(reader.TokenType != JsonToken.Null)
+            {
+                return PolymorphicProperty.FromJson(JObject.Load(reader).ToString(Formatting.None));
+            }
+            return null;
+        }
+
+        /// <summary>
+        /// Check if the object can be converted
+        /// </summary>
+        /// <param name="objectType">Object type</param>
+        /// <returns>True if the object can be converted</returns>
+        public override bool CanConvert(Type objectType)
+        {
+            return false;
+        }
+    }
+
+}

samples/client/petstore/csharp-netcore/OpenAPIClientCore/.openapi-generator/FILES

@@ -67,6 +67,7 @@ docs/ParentPet.md
 docs/Pet.md
 docs/PetApi.md
 docs/Pig.md
+docs/PolymorphicProperty.md
 docs/Quadrilateral.md
 docs/QuadrilateralInterface.md
 docs/ReadOnlyFirst.md
@@ -171,6 +172,7 @@ src/Org.OpenAPITools/Model/OuterEnumIntegerDefaultValue.cs
 src/Org.OpenAPITools/Model/ParentPet.cs
 src/Org.OpenAPITools/Model/Pet.cs
 src/Org.OpenAPITools/Model/Pig.cs
+src/Org.OpenAPITools/Model/PolymorphicProperty.cs
 src/Org.OpenAPITools/Model/Quadrilateral.cs
 src/Org.OpenAPITools/Model/QuadrilateralInterface.cs
 src/Org.OpenAPITools/Model/ReadOnlyFirst.cs

samples/client/petstore/csharp-netcore/OpenAPIClientCore/README.md

@@ -219,6 +219,7 @@ Class | Method | HTTP request | Description
  - [Model.ParentPet](docs/ParentPet.md)
  - [Model.Pet](docs/Pet.md)
  - [Model.Pig](docs/Pig.md)
+ - [Model.PolymorphicProperty](docs/PolymorphicProperty.md)
  - [Model.Quadrilateral](docs/Quadrilateral.md)
  - [Model.QuadrilateralInterface](docs/QuadrilateralInterface.md)
  - [Model.ReadOnlyFirst](docs/ReadOnlyFirst.md)

samples/client/petstore/csharp-netcore/OpenAPIClientCore/docs/PolymorphicProperty.md

@@ -0,0 +1,9 @@
+# Org.OpenAPITools.Model.PolymorphicProperty
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+

samples/client/petstore/csharp-netcore/OpenAPIClientCore/src/Org.OpenAPITools.Test/Model/PolymorphicPropertyTests.cs

@@ -0,0 +1,62 @@
+/*
+ * OpenAPI Petstore
+ *
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * Generated by: https://github.com/openapitools/openapi-generator.git
+ */
+
+
+using Xunit;
+
+using System;
+using System.Linq;
+using System.IO;
+using System.Collections.Generic;
+using Org.OpenAPITools.Api;
+using Org.OpenAPITools.Model;
+using Org.OpenAPITools.Client;
+using System.Reflection;
+using Newtonsoft.Json;
+
+namespace Org.OpenAPITools.Test.Model
+{
+    /// <summary>
+    ///  Class for testing PolymorphicProperty
+    /// </summary>
+    /// <remarks>
+    /// This file is automatically generated by OpenAPI Generator (https://openapi-generator.tech).
+    /// Please update the test case below to test the model.
+    /// </remarks>
+    public class PolymorphicPropertyTests : IDisposable
+    {
+        // TODO uncomment below to declare an instance variable for PolymorphicProperty
+        //private PolymorphicProperty instance;
+
+        public PolymorphicPropertyTests()
+        {
+            // TODO uncomment below to create an instance of PolymorphicProperty
+            //instance = new PolymorphicProperty();
+        }
+
+        public void Dispose()
+        {
+            // Cleanup when everything is done.
+        }
+
+        /// <summary>
+        /// Test an instance of PolymorphicProperty
+        /// </summary>
+        [Fact]
+        public void PolymorphicPropertyInstanceTest()
+        {
+            // TODO uncomment below to test "IsType" PolymorphicProperty
+            //Assert.IsType<PolymorphicProperty>(instance);
+        }
+
+
+
+    }
+
+}

samples/client/petstore/csharp-netcore/OpenAPIClientCore/src/Org.OpenAPITools/Model/PolymorphicProperty.cs

@@ -0,0 +1,383 @@
+/*
+ * OpenAPI Petstore
+ *
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * Generated by: https://github.com/openapitools/openapi-generator.git
+ */
+
+
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Linq;
+using System.IO;
+using System.Runtime.Serialization;
+using System.Text;
+using System.Text.RegularExpressions;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Converters;
+using Newtonsoft.Json.Linq;
+using System.ComponentModel.DataAnnotations;
+using OpenAPIDateConverter = Org.OpenAPITools.Client.OpenAPIDateConverter;
+using OpenAPIClientUtils = Org.OpenAPITools.Client.ClientUtils;
+using System.Reflection;
+
+namespace Org.OpenAPITools.Model
+{
+    /// <summary>
+    /// PolymorphicProperty
+    /// </summary>
+    [JsonConverter(typeof(PolymorphicPropertyJsonConverter))]
+    [DataContract(Name = "PolymorphicProperty")]
+    public partial class PolymorphicProperty : AbstractOpenAPISchema, IEquatable<PolymorphicProperty>, IValidatableObject
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="PolymorphicProperty" /> class
+        /// with the <see cref="bool" /> class
+        /// </summary>
+        /// <param name="actualInstance">An instance of bool.</param>
+        public PolymorphicProperty(bool actualInstance)
+        {
+            this.IsNullable = false;
+            this.SchemaType= "oneOf";
+            this.ActualInstance = actualInstance;
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="PolymorphicProperty" /> class
+        /// with the <see cref="string" /> class
+        /// </summary>
+        /// <param name="actualInstance">An instance of string.</param>
+        public PolymorphicProperty(string actualInstance)
+        {
+            this.IsNullable = false;
+            this.SchemaType= "oneOf";
+            this.ActualInstance = actualInstance ?? throw new ArgumentException("Invalid instance found. Must not be null.");
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="PolymorphicProperty" /> class
+        /// with the <see cref="Object" /> class
+        /// </summary>
+        /// <param name="actualInstance">An instance of Object.</param>
+        public PolymorphicProperty(Object actualInstance)
+        {
+            this.IsNullable = false;
+            this.SchemaType= "oneOf";
+            this.ActualInstance = actualInstance ?? throw new ArgumentException("Invalid instance found. Must not be null.");
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="PolymorphicProperty" /> class
+        /// with the <see cref="List&lt;string&gt;" /> class
+        /// </summary>
+        /// <param name="actualInstance">An instance of List&lt;string&gt;.</param>
+        public PolymorphicProperty(List<string> actualInstance)
+        {
+            this.IsNullable = false;
+            this.SchemaType= "oneOf";
+            this.ActualInstance = actualInstance ?? throw new ArgumentException("Invalid instance found. Must not be null.");
+        }
+
+
+        private Object _actualInstance;
+
+        /// <summary>
+        /// Gets or Sets ActualInstance
+        /// </summary>
+        public override Object ActualInstance
+        {
+            get
+            {
+                return _actualInstance;
+            }
+            set
+            {
+                if (value.GetType() == typeof(List<string>))
+                {
+                    this._actualInstance = value;
+                }
+                else if (value.GetType() == typeof(Object))
+                {
+                    this._actualInstance = value;
+                }
+                else if (value.GetType() == typeof(bool))
+                {
+                    this._actualInstance = value;
+                }
+                else if (value.GetType() == typeof(string))
+                {
+                    this._actualInstance = value;
+                }
+                else
+                {
+                    throw new ArgumentException("Invalid instance found. Must be the following types: List<string>, Object, bool, string");
+                }
+            }
+        }
+
+        /// <summary>
+        /// Get the actual instance of `bool`. If the actual instance is not `bool`,
+        /// the InvalidClassException will be thrown
+        /// </summary>
+        /// <returns>An instance of bool</returns>
+        public bool GetBool()
+        {
+            return (bool)this.ActualInstance;
+        }
+
+        /// <summary>
+        /// Get the actual instance of `string`. If the actual instance is not `string`,
+        /// the InvalidClassException will be thrown
+        /// </summary>
+        /// <returns>An instance of string</returns>
+        public string GetString()
+        {
+            return (string)this.ActualInstance;
+        }
+
+        /// <summary>
+        /// Get the actual instance of `Object`. If the actual instance is not `Object`,
+        /// the InvalidClassException will be thrown
+        /// </summary>
+        /// <returns>An instance of Object</returns>
+        public Object GetObject()
+        {
+            return (Object)this.ActualInstance;
+        }
+
+        /// <summary>
+        /// Get the actual instance of `List&lt;string&gt;`. If the actual instance is not `List&lt;string&gt;`,
+        /// the InvalidClassException will be thrown
+        /// </summary>
+        /// <returns>An instance of List&lt;string&gt;</returns>
+        public List<string> GetListString()
+        {
+            return (List<string>)this.ActualInstance;
+        }
+
+        /// <summary>
+        /// Returns the string presentation of the object
+        /// </summary>
+        /// <returns>String presentation of the object</returns>
+        public override string ToString()
+        {
+            var sb = new StringBuilder();
+            sb.Append("class PolymorphicProperty {\n");
+            sb.Append("  ActualInstance: ").Append(this.ActualInstance).Append("\n");
+            sb.Append("}\n");
+            return sb.ToString();
+        }
+
+        /// <summary>
+        /// Returns the JSON string presentation of the object
+        /// </summary>
+        /// <returns>JSON string presentation of the object</returns>
+        public override string ToJson()
+        {
+            return JsonConvert.SerializeObject(this.ActualInstance, PolymorphicProperty.SerializerSettings);
+        }
+
+        /// <summary>
+        /// Converts the JSON string into an instance of PolymorphicProperty
+        /// </summary>
+        /// <param name="jsonString">JSON string</param>
+        /// <returns>An instance of PolymorphicProperty</returns>
+        public static PolymorphicProperty FromJson(string jsonString)
+        {
+            PolymorphicProperty newPolymorphicProperty = null;
+
+            if (string.IsNullOrEmpty(jsonString))
+            {
+                return newPolymorphicProperty;
+            }
+            int match = 0;
+            List<string> matchedTypes = new List<string>();
+
+            try
+            {
+                // if it does not contains "AdditionalProperties", use SerializerSettings to deserialize
+                if (typeof(List<string>).GetProperty("AdditionalProperties") == null)
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<List<string>>(jsonString, PolymorphicProperty.SerializerSettings));
+                }
+                else
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<List<string>>(jsonString, PolymorphicProperty.AdditionalPropertiesSerializerSettings));
+                }
+                matchedTypes.Add("List<string>");
+                match++;
+            }
+            catch (Exception exception)
+            {
+                // deserialization failed, try the next one
+                System.Diagnostics.Debug.WriteLine(string.Format("Failed to deserialize `{0}` into List<string>: {1}", jsonString, exception.ToString()));
+            }
+
+            try
+            {
+                // if it does not contains "AdditionalProperties", use SerializerSettings to deserialize
+                if (typeof(Object).GetProperty("AdditionalProperties") == null)
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<Object>(jsonString, PolymorphicProperty.SerializerSettings));
+                }
+                else
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<Object>(jsonString, PolymorphicProperty.AdditionalPropertiesSerializerSettings));
+                }
+                matchedTypes.Add("Object");
+                match++;
+            }
+            catch (Exception exception)
+            {
+                // deserialization failed, try the next one
+                System.Diagnostics.Debug.WriteLine(string.Format("Failed to deserialize `{0}` into Object: {1}", jsonString, exception.ToString()));
+            }
+
+            try
+            {
+                // if it does not contains "AdditionalProperties", use SerializerSettings to deserialize
+                if (typeof(bool).GetProperty("AdditionalProperties") == null)
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<bool>(jsonString, PolymorphicProperty.SerializerSettings));
+                }
+                else
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<bool>(jsonString, PolymorphicProperty.AdditionalPropertiesSerializerSettings));
+                }
+                matchedTypes.Add("bool");
+                match++;
+            }
+            catch (Exception exception)
+            {
+                // deserialization failed, try the next one
+                System.Diagnostics.Debug.WriteLine(string.Format("Failed to deserialize `{0}` into bool: {1}", jsonString, exception.ToString()));
+            }
+
+            try
+            {
+                // if it does not contains "AdditionalProperties", use SerializerSettings to deserialize
+                if (typeof(string).GetProperty("AdditionalProperties") == null)
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<string>(jsonString, PolymorphicProperty.SerializerSettings));
+                }
+                else
+                {
+                    newPolymorphicProperty = new PolymorphicProperty(JsonConvert.DeserializeObject<string>(jsonString, PolymorphicProperty.AdditionalPropertiesSerializerSettings));
+                }
+                matchedTypes.Add("string");
+                match++;
+            }
+            catch (Exception exception)
+            {
+                // deserialization failed, try the next one
+                System.Diagnostics.Debug.WriteLine(string.Format("Failed to deserialize `{0}` into string: {1}", jsonString, exception.ToString()));
+            }
+
+            if (match == 0)
+            {
+                throw new InvalidDataException("The JSON string `" + jsonString + "` cannot be deserialized into any schema defined.");
+            }
+            else if (match > 1)
+            {
+                throw new InvalidDataException("The JSON string `" + jsonString + "` incorrectly matches more than one schema (should be exactly one match): " + matchedTypes);
+            }
+
+            // deserialization is considered successful at this point if no exception has been thrown.
+            return newPolymorphicProperty;
+        }
+
+        /// <summary>
+        /// Returns true if objects are equal
+        /// </summary>
+        /// <param name="input">Object to be compared</param>
+        /// <returns>Boolean</returns>
+        public override bool Equals(object input)
+        {
+            return OpenAPIClientUtils.compareLogic.Compare(this, input as PolymorphicProperty).AreEqual;
+        }
+
+        /// <summary>
+        /// Returns true if PolymorphicProperty instances are equal
+        /// </summary>
+        /// <param name="input">Instance of PolymorphicProperty to be compared</param>
+        /// <returns>Boolean</returns>
+        public bool Equals(PolymorphicProperty input)
+        {
+            return OpenAPIClientUtils.compareLogic.Compare(this, input).AreEqual;
+        }
+
+        /// <summary>
+        /// Gets the hash code
+        /// </summary>
+        /// <returns>Hash code</returns>
+        public override int GetHashCode()
+        {
+            unchecked // Overflow is fine, just wrap
+            {
+                int hashCode = 41;
+                if (this.ActualInstance != null)
+                    hashCode = hashCode * 59 + this.ActualInstance.GetHashCode();
+                return hashCode;
+            }
+        }
+
+        /// <summary>
+        /// To validate all properties of the instance
+        /// </summary>
+        /// <param name="validationContext">Validation context</param>
+        /// <returns>Validation Result</returns>
+        IEnumerable<System.ComponentModel.DataAnnotations.ValidationResult> IValidatableObject.Validate(ValidationContext validationContext)
+        {
+            yield break;
+        }
+    }
+
+    /// <summary>
+    /// Custom JSON converter for PolymorphicProperty
+    /// </summary>
+    public class PolymorphicPropertyJsonConverter : JsonConverter
+    {
+        /// <summary>
+        /// To write the JSON string
+        /// </summary>
+        /// <param name="writer">JSON writer</param>
+        /// <param name="value">Object to be converted into a JSON string</param>
+        /// <param name="serializer">JSON Serializer</param>
+        public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
+        {
+            writer.WriteRawValue((string)(typeof(PolymorphicProperty).GetMethod("ToJson").Invoke(value, null)));
+        }
+
+        /// <summary>
+        /// To convert a JSON string into an object
+        /// </summary>
+        /// <param name="reader">JSON reader</param>
+        /// <param name="objectType">Object type</param>
+        /// <param name="existingValue">Existing value</param>
+        /// <param name="serializer">JSON Serializer</param>
+        /// <returns>The object converted from the JSON string</returns>
+        public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
+        {
+            if(reader.TokenType != JsonToken.Null)
+            {
+                return PolymorphicProperty.FromJson(JObject.Load(reader).ToString(Formatting.None));
+            }
+            return null;
+        }
+
+        /// <summary>
+        /// Check if the object can be converted
+        /// </summary>
+        /// <param name="objectType">Object type</param>
+        /// <returns>True if the object can be converted</returns>
+        public override bool CanConvert(Type objectType)
+        {
+            return false;
+        }
+    }
+
+}