diff --git a/modules/openapi-generator/src/main/resources/csharp/modelGeneric.mustache b/modules/openapi-generator/src/main/resources/csharp/modelGeneric.mustache
index 0729bf9f582..432b6e34b8e 100644
--- a/modules/openapi-generator/src/main/resources/csharp/modelGeneric.mustache
+++ b/modules/openapi-generator/src/main/resources/csharp/modelGeneric.mustache
@@ -219,7 +219,9 @@
         {{^conditionalSerialization}}
         [DataMember(Name = "{{baseName}}"{{#required}}, IsRequired = true{{/required}}, EmitDefaultValue = {{#vendorExtensions.x-emit-default-value}}true{{/vendorExtensions.x-emit-default-value}}{{^vendorExtensions.x-emit-default-value}}{{#required}}true{{/required}}{{^required}}{{#isBoolean}}true{{/isBoolean}}{{^isBoolean}}{{#isNullable}}true{{/isNullable}}{{^isNullable}}false{{/isNullable}}{{/isBoolean}}{{/required}}{{/vendorExtensions.x-emit-default-value}})]
         {{#isDate}}
+        {{^supportsDateOnly}}
         [JsonConverter(typeof(OpenAPIDateConverter))]
+        {{/supportsDateOnly}}
         {{/isDate}}
         {{#deprecated}}
         [Obsolete]