[C#][netcore] Add IsRequired to the model properties (#7590)

* add IsRequired to c# model properties

* add deserialization tests for pet

* revise test

modules/openapi-generator/src/main/resources/csharp-netcore/modelGeneric.mustache

@@ -33,7 +33,7 @@
         {{#description}}
         /// <value>{{description}}</value>
         {{/description}}
-        [DataMember(Name = "{{baseName}}", EmitDefaultValue = {{#vendorExtensions.x-emit-default-value}}true{{/vendorExtensions.x-emit-default-value}}{{^vendorExtensions.x-emit-default-value}}{{#isNullable}}true{{/isNullable}}{{^isNullable}}false{{/isNullable}}{{/vendorExtensions.x-emit-default-value}})]
+        [DataMember(Name = "{{baseName}}"{{#required}}, IsRequired = true{{/required}}, EmitDefaultValue = {{#vendorExtensions.x-emit-default-value}}true{{/vendorExtensions.x-emit-default-value}}{{^vendorExtensions.x-emit-default-value}}{{#isNullable}}true{{/isNullable}}{{^isNullable}}false{{/isNullable}}{{/vendorExtensions.x-emit-default-value}})]
         public {{#complexType}}{{{complexType}}}{{/complexType}}{{^complexType}}{{{datatypeWithEnum}}}{{/complexType}}{{^isContainer}}{{^required}}?{{/required}}{{/isContainer}} {{name}} { get; set; }
         {{/isEnum}}
         {{/vars}}
@@ -112,7 +112,7 @@
         /// {{^description}}Gets or Sets {{{name}}}{{/description}}{{#description}}{{description}}{{/description}}
         /// </summary>{{#description}}
         /// <value>{{description}}</value>{{/description}}
-        [DataMember(Name = "{{baseName}}", EmitDefaultValue = {{#vendorExtensions.x-emit-default-value}}true{{/vendorExtensions.x-emit-default-value}}{{^vendorExtensions.x-emit-default-value}}{{#isNullable}}true{{/isNullable}}{{^isNullable}}false{{/isNullable}}{{/vendorExtensions.x-emit-default-value}})]
+        [DataMember(Name = "{{baseName}}"{{#required}}, IsRequired = true{{/required}}, EmitDefaultValue = {{#vendorExtensions.x-emit-default-value}}true{{/vendorExtensions.x-emit-default-value}}{{^vendorExtensions.x-emit-default-value}}{{#isNullable}}true{{/isNullable}}{{^isNullable}}false{{/isNullable}}{{/vendorExtensions.x-emit-default-value}})]
         {{#isDate}}
         [JsonConverter(typeof(OpenAPIDateConverter))]
         {{/isDate}}

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

@@ -182,6 +182,22 @@ namespace Org.OpenAPITools.Test
             Assert.False(p1.Equals(p2));
         }
 
+
+        /// <summary>
+        /// Test Pet deserialization
+        /// </summary>
+        [Fact]
+        public void TestDeserialization()
+        {
+            // properly deserialized, no exception
+            Pet p2 = JsonConvert.DeserializeObject<Pet>("{\n  \"name\": \"csharp test 2\",\n  \"photoUrls\": [\"http://petstore.com/csharp_test\", \"http://petstore.com/csharp_test2\"]\n}");
+            // comment out below as the result (json string) is OS dependent.
+            //Assert.Equal("{\n  \"name\": \"csharp test 2\",\n  \"photoUrls\": [\n    \"http://petstore.com/csharp_test\",\n    \"http://petstore.com/csharp_test2\"\n  ]\n}", p2.ToJson());
+
+            // Missing `name` to cause exceptions in deserialization
+            Assert.Throws<Newtonsoft.Json.JsonSerializationException>(() => JsonConvert.DeserializeObject<Pet>("{\n  \"Something\": \"csharp test 2\",\n  \"photoUrls\": [\"http://petstore.com/csharp_test\", \"http://petstore.com/csharp_test2\"]\n}"));
+        }
+
     }
 
 }

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

@@ -53,7 +53,7 @@ namespace Org.OpenAPITools.Test
             s.SpecialPropertyName = 123l;
             Assert.Equal("{\"$special[property.name]\":123}", JsonConvert.SerializeObject(s));
             // comment out the following as the result is OS-dependent
-            //Assert.Equal("{\"$special[property.name]\":123}", s.ToJson());
+            //Assert.Equal("{\"id\":123}", s.ToJson());
         }
 
     }

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

@@ -62,7 +62,7 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets ClassName
         /// </summary>
-        [DataMember(Name = "className", EmitDefaultValue = false)]
+        [DataMember(Name = "className", IsRequired = true, EmitDefaultValue = false)]
         public string ClassName { get; set; }
 
         /// <summary>

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

@@ -51,7 +51,7 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets Cultivar
         /// </summary>
-        [DataMember(Name = "cultivar", EmitDefaultValue = false)]
+        [DataMember(Name = "cultivar", IsRequired = true, EmitDefaultValue = false)]
         public string Cultivar { get; set; }
 
         /// <summary>

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

@@ -50,7 +50,7 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets LengthCm
         /// </summary>
-        [DataMember(Name = "lengthCm", EmitDefaultValue = false)]
+        [DataMember(Name = "lengthCm", IsRequired = true, EmitDefaultValue = false)]
         public decimal LengthCm { get; set; }
 
         /// <summary>

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

@@ -53,7 +53,7 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets ClassName
         /// </summary>
-        [DataMember(Name = "className", EmitDefaultValue = false)]
+        [DataMember(Name = "className", IsRequired = true, EmitDefaultValue = false)]
         public string ClassName { get; set; }
 
         /// <summary>

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

@@ -61,7 +61,7 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets Name
         /// </summary>
-        [DataMember(Name = "name", EmitDefaultValue = false)]
+        [DataMember(Name = "name", IsRequired = true, EmitDefaultValue = false)]
         public string Name { get; set; }
 
         /// <summary>

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

@@ -48,7 +48,7 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets PetType
         /// </summary>
-        [DataMember(Name = "pet_type", EmitDefaultValue = false)]
+        [DataMember(Name = "pet_type", IsRequired = true, EmitDefaultValue = false)]
         public PetTypeEnum PetType { get; set; }
         /// <summary>
         /// Initializes a new instance of the <see cref="ChildCat" /> class.

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

@@ -56,13 +56,13 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets ShapeType
         /// </summary>
-        [DataMember(Name = "shapeType", EmitDefaultValue = false)]
+        [DataMember(Name = "shapeType", IsRequired = true, EmitDefaultValue = false)]
         public string ShapeType { get; set; }
 
         /// <summary>
         /// Gets or Sets QuadrilateralType
         /// </summary>
-        [DataMember(Name = "quadrilateralType", EmitDefaultValue = false)]
+        [DataMember(Name = "quadrilateralType", IsRequired = true, EmitDefaultValue = false)]
         public string QuadrilateralType { get; set; }
 
         /// <summary>

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

@@ -53,7 +53,7 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets ClassName
         /// </summary>
-        [DataMember(Name = "className", EmitDefaultValue = false)]
+        [DataMember(Name = "className", IsRequired = true, EmitDefaultValue = false)]
         public string ClassName { get; set; }
 
         /// <summary>

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

@@ -91,7 +91,7 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets EnumStringRequired
         /// </summary>
-        [DataMember(Name = "enum_string_required", EmitDefaultValue = false)]
+        [DataMember(Name = "enum_string_required", IsRequired = true, EmitDefaultValue = false)]
         public EnumStringRequiredEnum EnumStringRequired { get; set; }
         /// <summary>
         /// Defines EnumInteger

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

@@ -56,13 +56,13 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets ShapeType
         /// </summary>
-        [DataMember(Name = "shapeType", EmitDefaultValue = false)]
+        [DataMember(Name = "shapeType", IsRequired = true, EmitDefaultValue = false)]
         public string ShapeType { get; set; }
 
         /// <summary>
         /// Gets or Sets TriangleType
         /// </summary>
-        [DataMember(Name = "triangleType", EmitDefaultValue = false)]
+        [DataMember(Name = "triangleType", IsRequired = true, EmitDefaultValue = false)]
         public string TriangleType { get; set; }
 
         /// <summary>

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

@@ -100,7 +100,7 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets Number
         /// </summary>
-        [DataMember(Name = "number", EmitDefaultValue = false)]
+        [DataMember(Name = "number", IsRequired = true, EmitDefaultValue = false)]
         public decimal Number { get; set; }
 
         /// <summary>
@@ -124,7 +124,7 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets Byte
         /// </summary>
-        [DataMember(Name = "byte", EmitDefaultValue = false)]
+        [DataMember(Name = "byte", IsRequired = true, EmitDefaultValue = false)]
         public byte[] Byte { get; set; }
 
         /// <summary>
@@ -136,7 +136,7 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets Date
         /// </summary>
-        [DataMember(Name = "date", EmitDefaultValue = false)]
+        [DataMember(Name = "date", IsRequired = true, EmitDefaultValue = false)]
         [JsonConverter(typeof(OpenAPIDateConverter))]
         public DateTime Date { get; set; }
 
@@ -155,7 +155,7 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets Password
         /// </summary>
-        [DataMember(Name = "password", EmitDefaultValue = false)]
+        [DataMember(Name = "password", IsRequired = true, EmitDefaultValue = false)]
         public string Password { get; set; }
 
         /// <summary>

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

@@ -55,7 +55,7 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets Cultivar
         /// </summary>
-        [DataMember(Name = "cultivar", EmitDefaultValue = false)]
+        [DataMember(Name = "cultivar", IsRequired = true, EmitDefaultValue = false)]
         public string Cultivar { get; set; }
 
         /// <summary>
@@ -67,7 +67,7 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets LengthCm
         /// </summary>
-        [DataMember(Name = "lengthCm", EmitDefaultValue = false)]
+        [DataMember(Name = "lengthCm", IsRequired = true, EmitDefaultValue = false)]
         public decimal LengthCm { get; set; }
 
         /// <summary>

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

@@ -59,7 +59,7 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets PetType
         /// </summary>
-        [DataMember(Name = "pet_type", EmitDefaultValue = false)]
+        [DataMember(Name = "pet_type", IsRequired = true, EmitDefaultValue = false)]
         public string PetType { get; set; }
 
         /// <summary>

samples/client/petstore/csharp-netcore/OpenAPIClient/src/Org.OpenAPITools/Model/InlineObject3.cs

@@ -102,7 +102,7 @@ namespace Org.OpenAPITools.Model
         /// None
         /// </summary>
         /// <value>None</value>
-        [DataMember(Name = "number", EmitDefaultValue = false)]
+        [DataMember(Name = "number", IsRequired = true, EmitDefaultValue = false)]
         public decimal Number { get; set; }
 
         /// <summary>
@@ -116,7 +116,7 @@ namespace Org.OpenAPITools.Model
         /// None
         /// </summary>
         /// <value>None</value>
-        [DataMember(Name = "double", EmitDefaultValue = false)]
+        [DataMember(Name = "double", IsRequired = true, EmitDefaultValue = false)]
         public double Double { get; set; }
 
         /// <summary>
@@ -130,14 +130,14 @@ namespace Org.OpenAPITools.Model
         /// None
         /// </summary>
         /// <value>None</value>
-        [DataMember(Name = "pattern_without_delimiter", EmitDefaultValue = false)]
+        [DataMember(Name = "pattern_without_delimiter", IsRequired = true, EmitDefaultValue = false)]
         public string PatternWithoutDelimiter { get; set; }
 
         /// <summary>
         /// None
         /// </summary>
         /// <value>None</value>
-        [DataMember(Name = "byte", EmitDefaultValue = false)]
+        [DataMember(Name = "byte", IsRequired = true, EmitDefaultValue = false)]
         public byte[] Byte { get; set; }
 
         /// <summary>

samples/client/petstore/csharp-netcore/OpenAPIClient/src/Org.OpenAPITools/Model/InlineObject4.cs

@@ -57,14 +57,14 @@ namespace Org.OpenAPITools.Model
         /// field1
         /// </summary>
         /// <value>field1</value>
-        [DataMember(Name = "param", EmitDefaultValue = false)]
+        [DataMember(Name = "param", IsRequired = true, EmitDefaultValue = false)]
         public string Param { get; set; }
 
         /// <summary>
         /// field2
         /// </summary>
         /// <value>field2</value>
-        [DataMember(Name = "param2", EmitDefaultValue = false)]
+        [DataMember(Name = "param2", IsRequired = true, EmitDefaultValue = false)]
         public string Param2 { get; set; }
 
         /// <summary>

samples/client/petstore/csharp-netcore/OpenAPIClient/src/Org.OpenAPITools/Model/InlineObject5.cs

@@ -63,7 +63,7 @@ namespace Org.OpenAPITools.Model
         /// file to upload
         /// </summary>
         /// <value>file to upload</value>
-        [DataMember(Name = "requiredFile", EmitDefaultValue = false)]
+        [DataMember(Name = "requiredFile", IsRequired = true, EmitDefaultValue = false)]
         public System.IO.Stream RequiredFile { get; set; }
 
         /// <summary>

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

@@ -52,13 +52,13 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets ShapeType
         /// </summary>
-        [DataMember(Name = "shapeType", EmitDefaultValue = false)]
+        [DataMember(Name = "shapeType", IsRequired = true, EmitDefaultValue = false)]
         public string ShapeType { get; set; }
 
         /// <summary>
         /// Gets or Sets TriangleType
         /// </summary>
-        [DataMember(Name = "triangleType", EmitDefaultValue = false)]
+        [DataMember(Name = "triangleType", IsRequired = true, EmitDefaultValue = false)]
         public string TriangleType { get; set; }
 
         /// <summary>

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

@@ -104,7 +104,7 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets ClassName
         /// </summary>
-        [DataMember(Name = "className", EmitDefaultValue = false)]
+        [DataMember(Name = "className", IsRequired = true, EmitDefaultValue = false)]
         public string ClassName { get; set; }
 
         /// <summary>

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

@@ -54,7 +54,7 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets _Name
         /// </summary>
-        [DataMember(Name = "name", EmitDefaultValue = false)]
+        [DataMember(Name = "name", IsRequired = true, EmitDefaultValue = false)]
         public int _Name { get; set; }
 
         /// <summary>

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

@@ -59,13 +59,13 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets ShapeType
         /// </summary>
-        [DataMember(Name = "shapeType", EmitDefaultValue = false)]
+        [DataMember(Name = "shapeType", IsRequired = true, EmitDefaultValue = false)]
         public string ShapeType { get; set; }
 
         /// <summary>
         /// Gets or Sets QuadrilateralType
         /// </summary>
-        [DataMember(Name = "quadrilateralType", EmitDefaultValue = false)]
+        [DataMember(Name = "quadrilateralType", IsRequired = true, EmitDefaultValue = false)]
         public string QuadrilateralType { get; set; }
 
         /// <summary>

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

@@ -109,13 +109,13 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets Name
         /// </summary>
-        [DataMember(Name = "name", EmitDefaultValue = false)]
+        [DataMember(Name = "name", IsRequired = true, EmitDefaultValue = false)]
         public string Name { get; set; }
 
         /// <summary>
         /// Gets or Sets PhotoUrls
         /// </summary>
-        [DataMember(Name = "photoUrls", EmitDefaultValue = false)]
+        [DataMember(Name = "photoUrls", IsRequired = true, EmitDefaultValue = false)]
         public List<string> PhotoUrls { get; set; }
 
         /// <summary>

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

@@ -55,7 +55,7 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets ClassName
         /// </summary>
-        [DataMember(Name = "className", EmitDefaultValue = false)]
+        [DataMember(Name = "className", IsRequired = true, EmitDefaultValue = false)]
         public string ClassName { get; set; }
 
         /// <summary>

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

@@ -58,13 +58,13 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets ShapeType
         /// </summary>
-        [DataMember(Name = "shapeType", EmitDefaultValue = false)]
+        [DataMember(Name = "shapeType", IsRequired = true, EmitDefaultValue = false)]
         public string ShapeType { get; set; }
 
         /// <summary>
         /// Gets or Sets QuadrilateralType
         /// </summary>
-        [DataMember(Name = "quadrilateralType", EmitDefaultValue = false)]
+        [DataMember(Name = "quadrilateralType", IsRequired = true, EmitDefaultValue = false)]
         public string QuadrilateralType { get; set; }
 
         /// <summary>

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

@@ -53,7 +53,7 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets QuadrilateralType
         /// </summary>
-        [DataMember(Name = "quadrilateralType", EmitDefaultValue = false)]
+        [DataMember(Name = "quadrilateralType", IsRequired = true, EmitDefaultValue = false)]
         public string QuadrilateralType { get; set; }
 
         /// <summary>

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

@@ -56,13 +56,13 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets ShapeType
         /// </summary>
-        [DataMember(Name = "shapeType", EmitDefaultValue = false)]
+        [DataMember(Name = "shapeType", IsRequired = true, EmitDefaultValue = false)]
         public string ShapeType { get; set; }
 
         /// <summary>
         /// Gets or Sets TriangleType
         /// </summary>
-        [DataMember(Name = "triangleType", EmitDefaultValue = false)]
+        [DataMember(Name = "triangleType", IsRequired = true, EmitDefaultValue = false)]
         public string TriangleType { get; set; }
 
         /// <summary>

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

@@ -59,13 +59,13 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets ShapeType
         /// </summary>
-        [DataMember(Name = "shapeType", EmitDefaultValue = false)]
+        [DataMember(Name = "shapeType", IsRequired = true, EmitDefaultValue = false)]
         public string ShapeType { get; set; }
 
         /// <summary>
         /// Gets or Sets QuadrilateralType
         /// </summary>
-        [DataMember(Name = "quadrilateralType", EmitDefaultValue = false)]
+        [DataMember(Name = "quadrilateralType", IsRequired = true, EmitDefaultValue = false)]
         public string QuadrilateralType { get; set; }
 
         /// <summary>

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

@@ -53,7 +53,7 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets ShapeType
         /// </summary>
-        [DataMember(Name = "shapeType", EmitDefaultValue = false)]
+        [DataMember(Name = "shapeType", IsRequired = true, EmitDefaultValue = false)]
         public string ShapeType { get; set; }
 
         /// <summary>

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

@@ -59,13 +59,13 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets ShapeType
         /// </summary>
-        [DataMember(Name = "shapeType", EmitDefaultValue = false)]
+        [DataMember(Name = "shapeType", IsRequired = true, EmitDefaultValue = false)]
         public string ShapeType { get; set; }
 
         /// <summary>
         /// Gets or Sets QuadrilateralType
         /// </summary>
-        [DataMember(Name = "quadrilateralType", EmitDefaultValue = false)]
+        [DataMember(Name = "quadrilateralType", IsRequired = true, EmitDefaultValue = false)]
         public string QuadrilateralType { get; set; }
 
         /// <summary>

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

@@ -56,13 +56,13 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets ShapeType
         /// </summary>
-        [DataMember(Name = "shapeType", EmitDefaultValue = false)]
+        [DataMember(Name = "shapeType", IsRequired = true, EmitDefaultValue = false)]
         public string ShapeType { get; set; }
 
         /// <summary>
         /// Gets or Sets QuadrilateralType
         /// </summary>
-        [DataMember(Name = "quadrilateralType", EmitDefaultValue = false)]
+        [DataMember(Name = "quadrilateralType", IsRequired = true, EmitDefaultValue = false)]
         public string QuadrilateralType { get; set; }
 
         /// <summary>

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

@@ -58,13 +58,13 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets ShapeType
         /// </summary>
-        [DataMember(Name = "shapeType", EmitDefaultValue = false)]
+        [DataMember(Name = "shapeType", IsRequired = true, EmitDefaultValue = false)]
         public string ShapeType { get; set; }
 
         /// <summary>
         /// Gets or Sets TriangleType
         /// </summary>
-        [DataMember(Name = "triangleType", EmitDefaultValue = false)]
+        [DataMember(Name = "triangleType", IsRequired = true, EmitDefaultValue = false)]
         public string TriangleType { get; set; }
 
         /// <summary>

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

@@ -53,7 +53,7 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets TriangleType
         /// </summary>
-        [DataMember(Name = "triangleType", EmitDefaultValue = false)]
+        [DataMember(Name = "triangleType", IsRequired = true, EmitDefaultValue = false)]
         public string TriangleType { get; set; }
 
         /// <summary>

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

@@ -69,7 +69,7 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets ClassName
         /// </summary>
-        [DataMember(Name = "className", EmitDefaultValue = false)]
+        [DataMember(Name = "className", IsRequired = true, EmitDefaultValue = false)]
         public string ClassName { get; set; }
 
         /// <summary>

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

@@ -86,7 +86,7 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets ClassName
         /// </summary>
-        [DataMember(Name = "className", EmitDefaultValue = false)]
+        [DataMember(Name = "className", IsRequired = true, EmitDefaultValue = false)]
         public string ClassName { get; set; }
 
         /// <summary>

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

@@ -58,7 +58,7 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets ClassName
         /// </summary>
-        [DataMember(Name = "className", EmitDefaultValue = false)]
+        [DataMember(Name = "className", IsRequired = true, EmitDefaultValue = false)]
         public string ClassName { get; set; }
 
         /// <summary>

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

@@ -51,7 +51,7 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets Cultivar
         /// </summary>
-        [DataMember(Name = "cultivar", EmitDefaultValue = false)]
+        [DataMember(Name = "cultivar", IsRequired = true, EmitDefaultValue = false)]
         public string Cultivar { get; set; }
 
         /// <summary>

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

@@ -50,7 +50,7 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets LengthCm
         /// </summary>
-        [DataMember(Name = "lengthCm", EmitDefaultValue = false)]
+        [DataMember(Name = "lengthCm", IsRequired = true, EmitDefaultValue = false)]
         public decimal LengthCm { get; set; }
 
         /// <summary>

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

@@ -49,7 +49,7 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets ClassName
         /// </summary>
-        [DataMember(Name = "className", EmitDefaultValue = false)]
+        [DataMember(Name = "className", IsRequired = true, EmitDefaultValue = false)]
         public string ClassName { get; set; }
 
         /// <summary>

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

@@ -57,7 +57,7 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets Name
         /// </summary>
-        [DataMember(Name = "name", EmitDefaultValue = false)]
+        [DataMember(Name = "name", IsRequired = true, EmitDefaultValue = false)]
         public string Name { get; set; }
 
         /// <summary>

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

@@ -48,7 +48,7 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets PetType
         /// </summary>
-        [DataMember(Name = "pet_type", EmitDefaultValue = false)]
+        [DataMember(Name = "pet_type", IsRequired = true, EmitDefaultValue = false)]
         public PetTypeEnum PetType { get; set; }
         /// <summary>
         /// Initializes a new instance of the <see cref="ChildCat" /> class.

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

@@ -52,13 +52,13 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets ShapeType
         /// </summary>
-        [DataMember(Name = "shapeType", EmitDefaultValue = false)]
+        [DataMember(Name = "shapeType", IsRequired = true, EmitDefaultValue = false)]
         public string ShapeType { get; set; }
 
         /// <summary>
         /// Gets or Sets QuadrilateralType
         /// </summary>
-        [DataMember(Name = "quadrilateralType", EmitDefaultValue = false)]
+        [DataMember(Name = "quadrilateralType", IsRequired = true, EmitDefaultValue = false)]
         public string QuadrilateralType { get; set; }
 
         /// <summary>

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

@@ -49,7 +49,7 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets ClassName
         /// </summary>
-        [DataMember(Name = "className", EmitDefaultValue = false)]
+        [DataMember(Name = "className", IsRequired = true, EmitDefaultValue = false)]
         public string ClassName { get; set; }
 
         /// <summary>

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

@@ -91,7 +91,7 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets EnumStringRequired
         /// </summary>
-        [DataMember(Name = "enum_string_required", EmitDefaultValue = false)]
+        [DataMember(Name = "enum_string_required", IsRequired = true, EmitDefaultValue = false)]
         public EnumStringRequiredEnum EnumStringRequired { get; set; }
         /// <summary>
         /// Defines EnumInteger

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

@@ -52,13 +52,13 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets ShapeType
         /// </summary>
-        [DataMember(Name = "shapeType", EmitDefaultValue = false)]
+        [DataMember(Name = "shapeType", IsRequired = true, EmitDefaultValue = false)]
         public string ShapeType { get; set; }
 
         /// <summary>
         /// Gets or Sets TriangleType
         /// </summary>
-        [DataMember(Name = "triangleType", EmitDefaultValue = false)]
+        [DataMember(Name = "triangleType", IsRequired = true, EmitDefaultValue = false)]
         public string TriangleType { get; set; }
 
         /// <summary>

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

@@ -96,7 +96,7 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets Number
         /// </summary>
-        [DataMember(Name = "number", EmitDefaultValue = false)]
+        [DataMember(Name = "number", IsRequired = true, EmitDefaultValue = false)]
         public decimal Number { get; set; }
 
         /// <summary>
@@ -120,7 +120,7 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets Byte
         /// </summary>
-        [DataMember(Name = "byte", EmitDefaultValue = false)]
+        [DataMember(Name = "byte", IsRequired = true, EmitDefaultValue = false)]
         public byte[] Byte { get; set; }
 
         /// <summary>
@@ -132,7 +132,7 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets Date
         /// </summary>
-        [DataMember(Name = "date", EmitDefaultValue = false)]
+        [DataMember(Name = "date", IsRequired = true, EmitDefaultValue = false)]
         [JsonConverter(typeof(OpenAPIDateConverter))]
         public DateTime Date { get; set; }
 
@@ -151,7 +151,7 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets Password
         /// </summary>
-        [DataMember(Name = "password", EmitDefaultValue = false)]
+        [DataMember(Name = "password", IsRequired = true, EmitDefaultValue = false)]
         public string Password { get; set; }
 
         /// <summary>

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

@@ -55,7 +55,7 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets Cultivar
         /// </summary>
-        [DataMember(Name = "cultivar", EmitDefaultValue = false)]
+        [DataMember(Name = "cultivar", IsRequired = true, EmitDefaultValue = false)]
         public string Cultivar { get; set; }
 
         /// <summary>
@@ -67,7 +67,7 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets LengthCm
         /// </summary>
-        [DataMember(Name = "lengthCm", EmitDefaultValue = false)]
+        [DataMember(Name = "lengthCm", IsRequired = true, EmitDefaultValue = false)]
         public decimal LengthCm { get; set; }
 
         /// <summary>

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

@@ -55,7 +55,7 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets PetType
         /// </summary>
-        [DataMember(Name = "pet_type", EmitDefaultValue = false)]
+        [DataMember(Name = "pet_type", IsRequired = true, EmitDefaultValue = false)]
         public string PetType { get; set; }
 
         /// <summary>

samples/client/petstore/csharp-netcore/OpenAPIClientCore/src/Org.OpenAPITools/Model/InlineObject3.cs

@@ -98,7 +98,7 @@ namespace Org.OpenAPITools.Model
         /// None
         /// </summary>
         /// <value>None</value>
-        [DataMember(Name = "number", EmitDefaultValue = false)]
+        [DataMember(Name = "number", IsRequired = true, EmitDefaultValue = false)]
         public decimal Number { get; set; }
 
         /// <summary>
@@ -112,7 +112,7 @@ namespace Org.OpenAPITools.Model
         /// None
         /// </summary>
         /// <value>None</value>
-        [DataMember(Name = "double", EmitDefaultValue = false)]
+        [DataMember(Name = "double", IsRequired = true, EmitDefaultValue = false)]
         public double Double { get; set; }
 
         /// <summary>
@@ -126,14 +126,14 @@ namespace Org.OpenAPITools.Model
         /// None
         /// </summary>
         /// <value>None</value>
-        [DataMember(Name = "pattern_without_delimiter", EmitDefaultValue = false)]
+        [DataMember(Name = "pattern_without_delimiter", IsRequired = true, EmitDefaultValue = false)]
         public string PatternWithoutDelimiter { get; set; }
 
         /// <summary>
         /// None
         /// </summary>
         /// <value>None</value>
-        [DataMember(Name = "byte", EmitDefaultValue = false)]
+        [DataMember(Name = "byte", IsRequired = true, EmitDefaultValue = false)]
         public byte[] Byte { get; set; }
 
         /// <summary>

samples/client/petstore/csharp-netcore/OpenAPIClientCore/src/Org.OpenAPITools/Model/InlineObject4.cs

@@ -53,14 +53,14 @@ namespace Org.OpenAPITools.Model
         /// field1
         /// </summary>
         /// <value>field1</value>
-        [DataMember(Name = "param", EmitDefaultValue = false)]
+        [DataMember(Name = "param", IsRequired = true, EmitDefaultValue = false)]
         public string Param { get; set; }
 
         /// <summary>
         /// field2
         /// </summary>
         /// <value>field2</value>
-        [DataMember(Name = "param2", EmitDefaultValue = false)]
+        [DataMember(Name = "param2", IsRequired = true, EmitDefaultValue = false)]
         public string Param2 { get; set; }
 
         /// <summary>

samples/client/petstore/csharp-netcore/OpenAPIClientCore/src/Org.OpenAPITools/Model/InlineObject5.cs

@@ -59,7 +59,7 @@ namespace Org.OpenAPITools.Model
         /// file to upload
         /// </summary>
         /// <value>file to upload</value>
-        [DataMember(Name = "requiredFile", EmitDefaultValue = false)]
+        [DataMember(Name = "requiredFile", IsRequired = true, EmitDefaultValue = false)]
         public System.IO.Stream RequiredFile { get; set; }
 
         /// <summary>

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

@@ -52,13 +52,13 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets ShapeType
         /// </summary>
-        [DataMember(Name = "shapeType", EmitDefaultValue = false)]
+        [DataMember(Name = "shapeType", IsRequired = true, EmitDefaultValue = false)]
         public string ShapeType { get; set; }
 
         /// <summary>
         /// Gets or Sets TriangleType
         /// </summary>
-        [DataMember(Name = "triangleType", EmitDefaultValue = false)]
+        [DataMember(Name = "triangleType", IsRequired = true, EmitDefaultValue = false)]
         public string TriangleType { get; set; }
 
         /// <summary>

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

@@ -100,7 +100,7 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets ClassName
         /// </summary>
-        [DataMember(Name = "className", EmitDefaultValue = false)]
+        [DataMember(Name = "className", IsRequired = true, EmitDefaultValue = false)]
         public string ClassName { get; set; }
 
         /// <summary>

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

@@ -50,7 +50,7 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets _Name
         /// </summary>
-        [DataMember(Name = "name", EmitDefaultValue = false)]
+        [DataMember(Name = "name", IsRequired = true, EmitDefaultValue = false)]
         public int _Name { get; set; }
 
         /// <summary>

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

@@ -55,13 +55,13 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets ShapeType
         /// </summary>
-        [DataMember(Name = "shapeType", EmitDefaultValue = false)]
+        [DataMember(Name = "shapeType", IsRequired = true, EmitDefaultValue = false)]
         public string ShapeType { get; set; }
 
         /// <summary>
         /// Gets or Sets QuadrilateralType
         /// </summary>
-        [DataMember(Name = "quadrilateralType", EmitDefaultValue = false)]
+        [DataMember(Name = "quadrilateralType", IsRequired = true, EmitDefaultValue = false)]
         public string QuadrilateralType { get; set; }
 
         /// <summary>

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

@@ -105,13 +105,13 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets Name
         /// </summary>
-        [DataMember(Name = "name", EmitDefaultValue = false)]
+        [DataMember(Name = "name", IsRequired = true, EmitDefaultValue = false)]
         public string Name { get; set; }
 
         /// <summary>
         /// Gets or Sets PhotoUrls
         /// </summary>
-        [DataMember(Name = "photoUrls", EmitDefaultValue = false)]
+        [DataMember(Name = "photoUrls", IsRequired = true, EmitDefaultValue = false)]
         public List<string> PhotoUrls { get; set; }
 
         /// <summary>

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

@@ -51,7 +51,7 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets ClassName
         /// </summary>
-        [DataMember(Name = "className", EmitDefaultValue = false)]
+        [DataMember(Name = "className", IsRequired = true, EmitDefaultValue = false)]
         public string ClassName { get; set; }
 
         /// <summary>

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

@@ -54,13 +54,13 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets ShapeType
         /// </summary>
-        [DataMember(Name = "shapeType", EmitDefaultValue = false)]
+        [DataMember(Name = "shapeType", IsRequired = true, EmitDefaultValue = false)]
         public string ShapeType { get; set; }
 
         /// <summary>
         /// Gets or Sets QuadrilateralType
         /// </summary>
-        [DataMember(Name = "quadrilateralType", EmitDefaultValue = false)]
+        [DataMember(Name = "quadrilateralType", IsRequired = true, EmitDefaultValue = false)]
         public string QuadrilateralType { get; set; }
 
         /// <summary>

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

@@ -49,7 +49,7 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets QuadrilateralType
         /// </summary>
-        [DataMember(Name = "quadrilateralType", EmitDefaultValue = false)]
+        [DataMember(Name = "quadrilateralType", IsRequired = true, EmitDefaultValue = false)]
         public string QuadrilateralType { get; set; }
 
         /// <summary>

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

@@ -52,13 +52,13 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets ShapeType
         /// </summary>
-        [DataMember(Name = "shapeType", EmitDefaultValue = false)]
+        [DataMember(Name = "shapeType", IsRequired = true, EmitDefaultValue = false)]
         public string ShapeType { get; set; }
 
         /// <summary>
         /// Gets or Sets TriangleType
         /// </summary>
-        [DataMember(Name = "triangleType", EmitDefaultValue = false)]
+        [DataMember(Name = "triangleType", IsRequired = true, EmitDefaultValue = false)]
         public string TriangleType { get; set; }
 
         /// <summary>

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

@@ -55,13 +55,13 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets ShapeType
         /// </summary>
-        [DataMember(Name = "shapeType", EmitDefaultValue = false)]
+        [DataMember(Name = "shapeType", IsRequired = true, EmitDefaultValue = false)]
         public string ShapeType { get; set; }
 
         /// <summary>
         /// Gets or Sets QuadrilateralType
         /// </summary>
-        [DataMember(Name = "quadrilateralType", EmitDefaultValue = false)]
+        [DataMember(Name = "quadrilateralType", IsRequired = true, EmitDefaultValue = false)]
         public string QuadrilateralType { get; set; }
 
         /// <summary>

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

@@ -49,7 +49,7 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets ShapeType
         /// </summary>
-        [DataMember(Name = "shapeType", EmitDefaultValue = false)]
+        [DataMember(Name = "shapeType", IsRequired = true, EmitDefaultValue = false)]
         public string ShapeType { get; set; }
 
         /// <summary>

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

@@ -55,13 +55,13 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets ShapeType
         /// </summary>
-        [DataMember(Name = "shapeType", EmitDefaultValue = false)]
+        [DataMember(Name = "shapeType", IsRequired = true, EmitDefaultValue = false)]
         public string ShapeType { get; set; }
 
         /// <summary>
         /// Gets or Sets QuadrilateralType
         /// </summary>
-        [DataMember(Name = "quadrilateralType", EmitDefaultValue = false)]
+        [DataMember(Name = "quadrilateralType", IsRequired = true, EmitDefaultValue = false)]
         public string QuadrilateralType { get; set; }
 
         /// <summary>

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

@@ -52,13 +52,13 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets ShapeType
         /// </summary>
-        [DataMember(Name = "shapeType", EmitDefaultValue = false)]
+        [DataMember(Name = "shapeType", IsRequired = true, EmitDefaultValue = false)]
         public string ShapeType { get; set; }
 
         /// <summary>
         /// Gets or Sets QuadrilateralType
         /// </summary>
-        [DataMember(Name = "quadrilateralType", EmitDefaultValue = false)]
+        [DataMember(Name = "quadrilateralType", IsRequired = true, EmitDefaultValue = false)]
         public string QuadrilateralType { get; set; }
 
         /// <summary>

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

@@ -54,13 +54,13 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets ShapeType
         /// </summary>
-        [DataMember(Name = "shapeType", EmitDefaultValue = false)]
+        [DataMember(Name = "shapeType", IsRequired = true, EmitDefaultValue = false)]
         public string ShapeType { get; set; }
 
         /// <summary>
         /// Gets or Sets TriangleType
         /// </summary>
-        [DataMember(Name = "triangleType", EmitDefaultValue = false)]
+        [DataMember(Name = "triangleType", IsRequired = true, EmitDefaultValue = false)]
         public string TriangleType { get; set; }
 
         /// <summary>

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

@@ -49,7 +49,7 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets TriangleType
         /// </summary>
-        [DataMember(Name = "triangleType", EmitDefaultValue = false)]
+        [DataMember(Name = "triangleType", IsRequired = true, EmitDefaultValue = false)]
         public string TriangleType { get; set; }
 
         /// <summary>

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

@@ -65,7 +65,7 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets ClassName
         /// </summary>
-        [DataMember(Name = "className", EmitDefaultValue = false)]
+        [DataMember(Name = "className", IsRequired = true, EmitDefaultValue = false)]
         public string ClassName { get; set; }
 
         /// <summary>

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

@@ -86,7 +86,7 @@ namespace Org.OpenAPITools.Model
         /// <summary>
         /// Gets or Sets ClassName
         /// </summary>
-        [DataMember(Name = "className", EmitDefaultValue = false)]
+        [DataMember(Name = "className", IsRequired = true, EmitDefaultValue = false)]
         public string ClassName { get; set; }
 
         /// <summary>