diff --git a/modules/openapi-generator/src/main/resources/csharp/libraries/generichost/JsonConverter.mustache b/modules/openapi-generator/src/main/resources/csharp/libraries/generichost/JsonConverter.mustache
index 24810c9cee43..e8f7fde2179e 100644
--- a/modules/openapi-generator/src/main/resources/csharp/libraries/generichost/JsonConverter.mustache
+++ b/modules/openapi-generator/src/main/resources/csharp/libraries/generichost/JsonConverter.mustache
@@ -251,7 +251,31 @@
                         {{^isNumeric}}
                         {{^isDate}}
                         {{^isDateTime}}
+                        {{#isArray}}
+                            {{#items.isEnum}}
+                            if (utf8JsonReader.TokenType == JsonTokenType.Null)
+                                {{#lambda.camelcase_sanitize_param}}{{name}}{{/lambda.camelcase_sanitize_param}} = {{>OptionProperty}}null);
+                            else
+                            {
+                                var {{#lambda.camelcase_sanitize_param}}{{name}}{{/lambda.camelcase_sanitize_param}}Items = new List<{{#items.isInnerEnum}}{{classname}}.{{/items.isInnerEnum}}{{{items.datatypeWithEnum}}}>();
+                                while (utf8JsonReader.Read())
+                                {
+                                    if (utf8JsonReader.TokenType == JsonTokenType.EndArray)
+                                        break;
+                                    string{{nrt?}} {{#lambda.camelcase_sanitize_param}}{{name}}{{/lambda.camelcase_sanitize_param}}ItemRawValue = utf8JsonReader.GetString();
+                                    if ({{#lambda.camelcase_sanitize_param}}{{name}}{{/lambda.camelcase_sanitize_param}}ItemRawValue != null)
+                                        {{#lambda.camelcase_sanitize_param}}{{name}}{{/lambda.camelcase_sanitize_param}}Items.Add({{^items.isInnerEnum}}{{{items.datatypeWithEnum}}}ValueConverter.FromStringOrDefault({{#lambda.camelcase_sanitize_param}}{{name}}{{/lambda.camelcase_sanitize_param}}ItemRawValue){{/items.isInnerEnum}}{{#items.isInnerEnum}}{{classname}}.{{{items.datatypeWithEnum}}}FromStringOrDefault({{#lambda.camelcase_sanitize_param}}{{name}}{{/lambda.camelcase_sanitize_param}}ItemRawValue){{/items.isInnerEnum}});
+                                }
+                                {{#lambda.camelcase_sanitize_param}}{{name}}{{/lambda.camelcase_sanitize_param}} = {{>OptionProperty}}{{#lambda.camelcase_sanitize_param}}{{name}}{{/lambda.camelcase_sanitize_param}}Items);
+                            }
+                            {{/items.isEnum}}
+                            {{^items.isEnum}}
                             {{#lambda.camelcase_sanitize_param}}{{name}}{{/lambda.camelcase_sanitize_param}} = {{>OptionProperty}}JsonSerializer.Deserialize<{{{datatypeWithEnum}}}>(ref utf8JsonReader, jsonSerializerOptions){{^isNullable}}{{nrt!}}{{/isNullable}});
+                            {{/items.isEnum}}
+                        {{/isArray}}
+                        {{^isArray}}
+                            {{#lambda.camelcase_sanitize_param}}{{name}}{{/lambda.camelcase_sanitize_param}} = {{>OptionProperty}}JsonSerializer.Deserialize<{{{datatypeWithEnum}}}>(ref utf8JsonReader, jsonSerializerOptions){{^isNullable}}{{nrt!}}{{/isNullable}});
+                        {{/isArray}}
                         {{/isDateTime}}
                         {{/isDate}}
                         {{/isNumeric}}
@@ -612,14 +636,30 @@
             if ({{#lambda.camelcase_sanitize_param}}{{classname}}{{/lambda.camelcase_sanitize_param}}.{{name}} != null)
             {
                 writer.WritePropertyName("{{baseName}}");
+                {{^items.isEnum}}
                 JsonSerializer.Serialize(writer, {{#lambda.camelcase_sanitize_param}}{{classname}}{{/lambda.camelcase_sanitize_param}}.{{name}}, jsonSerializerOptions);
+                {{/items.isEnum}}
+                {{#items.isEnum}}
+                writer.WriteStartArray();
+                foreach (var {{#lambda.camelcase_sanitize_param}}{{name}}{{/lambda.camelcase_sanitize_param}}Item in {{#lambda.camelcase_sanitize_param}}{{classname}}{{/lambda.camelcase_sanitize_param}}.{{name}})
+                    {{^items.isNumeric}}writer.WriteStringValue({{^items.isInnerEnum}}{{{items.datatypeWithEnum}}}ValueConverter.ToJsonValue({{#lambda.camelcase_sanitize_param}}{{name}}{{/lambda.camelcase_sanitize_param}}Item){{/items.isInnerEnum}}{{#items.isInnerEnum}}{{classname}}.{{{items.datatypeWithEnum}}}ToJsonValue({{#lambda.camelcase_sanitize_param}}{{name}}{{/lambda.camelcase_sanitize_param}}Item){{/items.isInnerEnum}});{{/items.isNumeric}}{{#items.isNumeric}}writer.WriteNumberValue({{^items.isInnerEnum}}{{{items.datatypeWithEnum}}}ValueConverter.ToJsonValue({{#lambda.camelcase_sanitize_param}}{{name}}{{/lambda.camelcase_sanitize_param}}Item){{/items.isInnerEnum}}{{#items.isInnerEnum}}{{classname}}.{{{items.datatypeWithEnum}}}ToJsonValue({{#lambda.camelcase_sanitize_param}}{{name}}{{/lambda.camelcase_sanitize_param}}Item){{/items.isInnerEnum}});{{/items.isNumeric}}
+                writer.WriteEndArray();
+                {{/items.isEnum}}
             }
             else
                 writer.WriteNull("{{baseName}}");
             {{/isNullable}}
             {{^isNullable}}
             writer.WritePropertyName("{{baseName}}");
+            {{^items.isEnum}}
             JsonSerializer.Serialize(writer, {{#lambda.camelcase_sanitize_param}}{{classname}}{{/lambda.camelcase_sanitize_param}}.{{name}}, jsonSerializerOptions);
+            {{/items.isEnum}}
+            {{#items.isEnum}}
+            writer.WriteStartArray();
+            foreach (var {{#lambda.camelcase_sanitize_param}}{{name}}{{/lambda.camelcase_sanitize_param}}Item in {{#lambda.camelcase_sanitize_param}}{{classname}}{{/lambda.camelcase_sanitize_param}}.{{name}})
+                {{^items.isNumeric}}writer.WriteStringValue({{^items.isInnerEnum}}{{{items.datatypeWithEnum}}}ValueConverter.ToJsonValue({{#lambda.camelcase_sanitize_param}}{{name}}{{/lambda.camelcase_sanitize_param}}Item){{/items.isInnerEnum}}{{#items.isInnerEnum}}{{classname}}.{{{items.datatypeWithEnum}}}ToJsonValue({{#lambda.camelcase_sanitize_param}}{{name}}{{/lambda.camelcase_sanitize_param}}Item){{/items.isInnerEnum}});{{/items.isNumeric}}{{#items.isNumeric}}writer.WriteNumberValue({{^items.isInnerEnum}}{{{items.datatypeWithEnum}}}ValueConverter.ToJsonValue({{#lambda.camelcase_sanitize_param}}{{name}}{{/lambda.camelcase_sanitize_param}}Item){{/items.isInnerEnum}}{{#items.isInnerEnum}}{{classname}}.{{{items.datatypeWithEnum}}}ToJsonValue({{#lambda.camelcase_sanitize_param}}{{name}}{{/lambda.camelcase_sanitize_param}}Item){{/items.isInnerEnum}});{{/items.isNumeric}}
+            writer.WriteEndArray();
+            {{/items.isEnum}}
             {{/isNullable}}
             {{/required}}
             {{^required}}
@@ -628,7 +668,15 @@
                 if ({{#lambda.camelcase_sanitize_param}}{{classname}}{{/lambda.camelcase_sanitize_param}}.{{name}}Option.Value != null)
                 {
                     writer.WritePropertyName("{{baseName}}");
+                    {{^items.isEnum}}
                     JsonSerializer.Serialize(writer, {{#lambda.camelcase_sanitize_param}}{{classname}}{{/lambda.camelcase_sanitize_param}}.{{name}}, jsonSerializerOptions);
+                    {{/items.isEnum}}
+                    {{#items.isEnum}}
+                    writer.WriteStartArray();
+                    foreach (var {{#lambda.camelcase_sanitize_param}}{{name}}{{/lambda.camelcase_sanitize_param}}Item in {{#lambda.camelcase_sanitize_param}}{{classname}}{{/lambda.camelcase_sanitize_param}}.{{name}}Option.Value{{nrt!}})
+                        {{^items.isNumeric}}writer.WriteStringValue({{^items.isInnerEnum}}{{{items.datatypeWithEnum}}}ValueConverter.ToJsonValue({{#lambda.camelcase_sanitize_param}}{{name}}{{/lambda.camelcase_sanitize_param}}Item){{/items.isInnerEnum}}{{#items.isInnerEnum}}{{classname}}.{{{items.datatypeWithEnum}}}ToJsonValue({{#lambda.camelcase_sanitize_param}}{{name}}{{/lambda.camelcase_sanitize_param}}Item){{/items.isInnerEnum}});{{/items.isNumeric}}{{#items.isNumeric}}writer.WriteNumberValue({{^items.isInnerEnum}}{{{items.datatypeWithEnum}}}ValueConverter.ToJsonValue({{#lambda.camelcase_sanitize_param}}{{name}}{{/lambda.camelcase_sanitize_param}}Item){{/items.isInnerEnum}}{{#items.isInnerEnum}}{{classname}}.{{{items.datatypeWithEnum}}}ToJsonValue({{#lambda.camelcase_sanitize_param}}{{name}}{{/lambda.camelcase_sanitize_param}}Item){{/items.isInnerEnum}});{{/items.isNumeric}}
+                    writer.WriteEndArray();
+                    {{/items.isEnum}}
                 }
                 else
                     writer.WriteNull("{{baseName}}");
@@ -636,7 +684,15 @@
             {{^isNullable}}
             {
                 writer.WritePropertyName("{{baseName}}");
+                {{^items.isEnum}}
                 JsonSerializer.Serialize(writer, {{#lambda.camelcase_sanitize_param}}{{classname}}{{/lambda.camelcase_sanitize_param}}.{{name}}, jsonSerializerOptions);
+                {{/items.isEnum}}
+                {{#items.isEnum}}
+                writer.WriteStartArray();
+                foreach (var {{#lambda.camelcase_sanitize_param}}{{name}}{{/lambda.camelcase_sanitize_param}}Item in {{#lambda.camelcase_sanitize_param}}{{classname}}{{/lambda.camelcase_sanitize_param}}.{{name}}{{nrt!}})
+                    {{^items.isNumeric}}writer.WriteStringValue({{^items.isInnerEnum}}{{{items.datatypeWithEnum}}}ValueConverter.ToJsonValue({{#lambda.camelcase_sanitize_param}}{{name}}{{/lambda.camelcase_sanitize_param}}Item){{/items.isInnerEnum}}{{#items.isInnerEnum}}{{classname}}.{{{items.datatypeWithEnum}}}ToJsonValue({{#lambda.camelcase_sanitize_param}}{{name}}{{/lambda.camelcase_sanitize_param}}Item){{/items.isInnerEnum}});{{/items.isNumeric}}{{#items.isNumeric}}writer.WriteNumberValue({{^items.isInnerEnum}}{{{items.datatypeWithEnum}}}ValueConverter.ToJsonValue({{#lambda.camelcase_sanitize_param}}{{name}}{{/lambda.camelcase_sanitize_param}}Item){{/items.isInnerEnum}}{{#items.isInnerEnum}}{{classname}}.{{{items.datatypeWithEnum}}}ToJsonValue({{#lambda.camelcase_sanitize_param}}{{name}}{{/lambda.camelcase_sanitize_param}}Item){{/items.isInnerEnum}});{{/items.isNumeric}}
+                writer.WriteEndArray();
+                {{/items.isEnum}}
             }
             {{/isNullable}}
             {{/required}}
diff --git a/modules/openapi-generator/src/test/resources/3_0/csharp/petstore-with-fake-endpoints-models-for-testing-with-http-signature.yaml b/modules/openapi-generator/src/test/resources/3_0/csharp/petstore-with-fake-endpoints-models-for-testing-with-http-signature.yaml
index 1c9e901ad0dd..f477f9443501 100644
--- a/modules/openapi-generator/src/test/resources/3_0/csharp/petstore-with-fake-endpoints-models-for-testing-with-http-signature.yaml
+++ b/modules/openapi-generator/src/test/resources/3_0/csharp/petstore-with-fake-endpoints-models-for-testing-with-http-signature.yaml
@@ -2039,6 +2039,14 @@ components:
             enum:
               - fish
               - crab
+        array_enum_nullable:
+          type: array
+          nullable: true
+          items:
+            type: string
+            enum:
+              - fish
+              - crab
     FreeFormObject:
       type: object
       description: A schema consisting only of additional properties