diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java
index bbeb2e8f87f..e8312cb6780 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java
@@ -239,6 +239,7 @@ public class DefaultCodegen implements CodegenConfig {
                         parent.setChildren(new ArrayList<CodegenModel>());
                     }
                     parent.getChildren().add(cm);
+                    parent.hasChildren = true;
                     if (parent.getDiscriminator() == null) {
                         parent = allModels.get(parent.getParent());
                     } else {
diff --git a/modules/openapi-generator/src/main/resources/csharp/modelGeneric.mustache b/modules/openapi-generator/src/main/resources/csharp/modelGeneric.mustache
index 89d35b73ec0..c547d137e18 100644
--- a/modules/openapi-generator/src/main/resources/csharp/modelGeneric.mustache
+++ b/modules/openapi-generator/src/main/resources/csharp/modelGeneric.mustache
@@ -217,7 +217,7 @@ this.{{name}} = {{#lambda.camelcase_param}}{{name}}{{/lambda.camelcase_param}};
 
 {{/generatePropertyChanged}}
 {{#validatable}}
-{{#discriminator}}
+{{#hasChildren}}
         /// <summary>
         /// To validate all properties of the instance
         /// </summary>
@@ -235,8 +235,8 @@ this.{{name}} = {{#lambda.camelcase_param}}{{name}}{{/lambda.camelcase_param}};
         /// <returns>Validation Result</returns>
         protected IEnumerable<System.ComponentModel.DataAnnotations.ValidationResult> BaseValidate(ValidationContext validationContext)
         {
-{{/discriminator}}
-{{^discriminator}}
+{{/hasChildren}}
+{{^hasChildren}}
         /// <summary>
         /// To validate all properties of the instance
         /// </summary>
@@ -244,11 +244,11 @@ this.{{name}} = {{#lambda.camelcase_param}}{{name}}{{/lambda.camelcase_param}};
         /// <returns>Validation Result</returns>
         IEnumerable<System.ComponentModel.DataAnnotations.ValidationResult> IValidatableObject.Validate(ValidationContext validationContext)
         {
-{{/discriminator}}
+{{/hasChildren}}
             {{#parent}}
             {{^isArrayModel}}
             {{^isMapModel}}
-            foreach(var x in BaseValidate(validationContext)) yield return x;
+            foreach(var x in base.BaseValidate(validationContext)) yield return x;
             {{/isMapModel}}
             {{/isArrayModel}}
             {{/parent}}
diff --git a/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools/Model/Cat.cs b/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools/Model/Cat.cs
index b9444fb3607..1504638f6f2 100644
--- a/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools/Model/Cat.cs
+++ b/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools/Model/Cat.cs
@@ -123,7 +123,7 @@ namespace Org.OpenAPITools.Model
         /// <returns>Validation Result</returns>
         IEnumerable<System.ComponentModel.DataAnnotations.ValidationResult> IValidatableObject.Validate(ValidationContext validationContext)
         {
-            foreach(var x in BaseValidate(validationContext)) yield return x;
+            foreach(var x in base.BaseValidate(validationContext)) yield return x;
             yield break;
         }
     }
diff --git a/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools/Model/Dog.cs b/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools/Model/Dog.cs
index 90c181c11b6..ecd67f40b6e 100644
--- a/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools/Model/Dog.cs
+++ b/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools/Model/Dog.cs
@@ -123,7 +123,7 @@ namespace Org.OpenAPITools.Model
         /// <returns>Validation Result</returns>
         IEnumerable<System.ComponentModel.DataAnnotations.ValidationResult> IValidatableObject.Validate(ValidationContext validationContext)
         {
-            foreach(var x in BaseValidate(validationContext)) yield return x;
+            foreach(var x in base.BaseValidate(validationContext)) yield return x;
             yield break;
         }
     }