diff --git a/modules/openapi-generator/src/main/resources/csharp/HttpSigningConfiguration.mustache b/modules/openapi-generator/src/main/resources/csharp/HttpSigningConfiguration.mustache
index 33791a908579..9566e1f1aed5 100644
--- a/modules/openapi-generator/src/main/resources/csharp/HttpSigningConfiguration.mustache
+++ b/modules/openapi-generator/src/main/resources/csharp/HttpSigningConfiguration.mustache
@@ -82,7 +82,7 @@ namespace {{packageName}}.Client
         /// <param name="path">Path</param>
         /// <param name="requestOptions">Request options</param>
         /// <returns>Http signed headers</returns>
-        internal Dictionary<string, string> GetHttpSignedHeader(string basePath,string method, string path, RequestOptions requestOptions)
+        public Dictionary<string, string> GetHttpSignedHeader(string basePath,string method, string path, RequestOptions requestOptions)
         {
             const string HEADER_REQUEST_TARGET = "(request-target)";
             //The time when the HTTP signature expires. The API server should reject HTTP requests
diff --git a/samples/client/petstore/csharp/httpclient/standard2.0/Petstore/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs b/samples/client/petstore/csharp/httpclient/standard2.0/Petstore/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs
index 256f338e1817..26a72daaf38f 100644
--- a/samples/client/petstore/csharp/httpclient/standard2.0/Petstore/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs
+++ b/samples/client/petstore/csharp/httpclient/standard2.0/Petstore/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs
@@ -90,7 +90,7 @@ private enum PrivateKeyType
         /// <param name="path">Path</param>
         /// <param name="requestOptions">Request options</param>
         /// <returns>Http signed headers</returns>
-        internal Dictionary<string, string> GetHttpSignedHeader(string basePath,string method, string path, RequestOptions requestOptions)
+        public Dictionary<string, string> GetHttpSignedHeader(string basePath,string method, string path, RequestOptions requestOptions)
         {
             const string HEADER_REQUEST_TARGET = "(request-target)";
             //The time when the HTTP signature expires. The API server should reject HTTP requests
diff --git a/samples/client/petstore/csharp/restsharp/net4.7/Petstore/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs b/samples/client/petstore/csharp/restsharp/net4.7/Petstore/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs
index 256f338e1817..26a72daaf38f 100644
--- a/samples/client/petstore/csharp/restsharp/net4.7/Petstore/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs
+++ b/samples/client/petstore/csharp/restsharp/net4.7/Petstore/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs
@@ -90,7 +90,7 @@ private enum PrivateKeyType
         /// <param name="path">Path</param>
         /// <param name="requestOptions">Request options</param>
         /// <returns>Http signed headers</returns>
-        internal Dictionary<string, string> GetHttpSignedHeader(string basePath,string method, string path, RequestOptions requestOptions)
+        public Dictionary<string, string> GetHttpSignedHeader(string basePath,string method, string path, RequestOptions requestOptions)
         {
             const string HEADER_REQUEST_TARGET = "(request-target)";
             //The time when the HTTP signature expires. The API server should reject HTTP requests
diff --git a/samples/client/petstore/csharp/restsharp/net4.8/Petstore/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs b/samples/client/petstore/csharp/restsharp/net4.8/Petstore/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs
index 256f338e1817..26a72daaf38f 100644
--- a/samples/client/petstore/csharp/restsharp/net4.8/Petstore/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs
+++ b/samples/client/petstore/csharp/restsharp/net4.8/Petstore/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs
@@ -90,7 +90,7 @@ private enum PrivateKeyType
         /// <param name="path">Path</param>
         /// <param name="requestOptions">Request options</param>
         /// <returns>Http signed headers</returns>
-        internal Dictionary<string, string> GetHttpSignedHeader(string basePath,string method, string path, RequestOptions requestOptions)
+        public Dictionary<string, string> GetHttpSignedHeader(string basePath,string method, string path, RequestOptions requestOptions)
         {
             const string HEADER_REQUEST_TARGET = "(request-target)";
             //The time when the HTTP signature expires. The API server should reject HTTP requests
diff --git a/samples/client/petstore/csharp/restsharp/net7/EnumMappings/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs b/samples/client/petstore/csharp/restsharp/net7/EnumMappings/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs
index 0685800345a1..51fbdfa548b8 100644
--- a/samples/client/petstore/csharp/restsharp/net7/EnumMappings/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs
+++ b/samples/client/petstore/csharp/restsharp/net7/EnumMappings/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs
@@ -90,7 +90,7 @@ private enum PrivateKeyType
         /// <param name="path">Path</param>
         /// <param name="requestOptions">Request options</param>
         /// <returns>Http signed headers</returns>
-        internal Dictionary<string, string> GetHttpSignedHeader(string basePath,string method, string path, RequestOptions requestOptions)
+        public Dictionary<string, string> GetHttpSignedHeader(string basePath,string method, string path, RequestOptions requestOptions)
         {
             const string HEADER_REQUEST_TARGET = "(request-target)";
             //The time when the HTTP signature expires. The API server should reject HTTP requests
diff --git a/samples/client/petstore/csharp/restsharp/net7/Petstore/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs b/samples/client/petstore/csharp/restsharp/net7/Petstore/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs
index 0685800345a1..51fbdfa548b8 100644
--- a/samples/client/petstore/csharp/restsharp/net7/Petstore/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs
+++ b/samples/client/petstore/csharp/restsharp/net7/Petstore/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs
@@ -90,7 +90,7 @@ private enum PrivateKeyType
         /// <param name="path">Path</param>
         /// <param name="requestOptions">Request options</param>
         /// <returns>Http signed headers</returns>
-        internal Dictionary<string, string> GetHttpSignedHeader(string basePath,string method, string path, RequestOptions requestOptions)
+        public Dictionary<string, string> GetHttpSignedHeader(string basePath,string method, string path, RequestOptions requestOptions)
         {
             const string HEADER_REQUEST_TARGET = "(request-target)";
             //The time when the HTTP signature expires. The API server should reject HTTP requests
diff --git a/samples/client/petstore/csharp/restsharp/standard2.0/ConditionalSerialization/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs b/samples/client/petstore/csharp/restsharp/standard2.0/ConditionalSerialization/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs
index 256f338e1817..26a72daaf38f 100644
--- a/samples/client/petstore/csharp/restsharp/standard2.0/ConditionalSerialization/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs
+++ b/samples/client/petstore/csharp/restsharp/standard2.0/ConditionalSerialization/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs
@@ -90,7 +90,7 @@ private enum PrivateKeyType
         /// <param name="path">Path</param>
         /// <param name="requestOptions">Request options</param>
         /// <returns>Http signed headers</returns>
-        internal Dictionary<string, string> GetHttpSignedHeader(string basePath,string method, string path, RequestOptions requestOptions)
+        public Dictionary<string, string> GetHttpSignedHeader(string basePath,string method, string path, RequestOptions requestOptions)
         {
             const string HEADER_REQUEST_TARGET = "(request-target)";
             //The time when the HTTP signature expires. The API server should reject HTTP requests
diff --git a/samples/client/petstore/csharp/restsharp/standard2.0/Petstore/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs b/samples/client/petstore/csharp/restsharp/standard2.0/Petstore/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs
index 256f338e1817..26a72daaf38f 100644
--- a/samples/client/petstore/csharp/restsharp/standard2.0/Petstore/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs
+++ b/samples/client/petstore/csharp/restsharp/standard2.0/Petstore/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs
@@ -90,7 +90,7 @@ private enum PrivateKeyType
         /// <param name="path">Path</param>
         /// <param name="requestOptions">Request options</param>
         /// <returns>Http signed headers</returns>
-        internal Dictionary<string, string> GetHttpSignedHeader(string basePath,string method, string path, RequestOptions requestOptions)
+        public Dictionary<string, string> GetHttpSignedHeader(string basePath,string method, string path, RequestOptions requestOptions)
         {
             const string HEADER_REQUEST_TARGET = "(request-target)";
             //The time when the HTTP signature expires. The API server should reject HTTP requests
diff --git a/samples/client/petstore/csharp/unityWebRequest/standard2.0/Petstore/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs b/samples/client/petstore/csharp/unityWebRequest/standard2.0/Petstore/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs
index 256f338e1817..26a72daaf38f 100644
--- a/samples/client/petstore/csharp/unityWebRequest/standard2.0/Petstore/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs
+++ b/samples/client/petstore/csharp/unityWebRequest/standard2.0/Petstore/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs
@@ -90,7 +90,7 @@ private enum PrivateKeyType
         /// <param name="path">Path</param>
         /// <param name="requestOptions">Request options</param>
         /// <returns>Http signed headers</returns>
-        internal Dictionary<string, string> GetHttpSignedHeader(string basePath,string method, string path, RequestOptions requestOptions)
+        public Dictionary<string, string> GetHttpSignedHeader(string basePath,string method, string path, RequestOptions requestOptions)
         {
             const string HEADER_REQUEST_TARGET = "(request-target)";
             //The time when the HTTP signature expires. The API server should reject HTTP requests
diff --git a/samples/client/petstore/kotlin-model-prefix-type-mappings/local.properties b/samples/client/petstore/kotlin-model-prefix-type-mappings/local.properties
new file mode 100644
index 000000000000..16593d85be7d
--- /dev/null
+++ b/samples/client/petstore/kotlin-model-prefix-type-mappings/local.properties
@@ -0,0 +1,8 @@
+## This file must *NOT* be checked into Version Control Systems,
+# as it contains information specific to your local configuration.
+#
+# Location of the SDK. This is only used by Gradle.
+# For customization when using a Version Control System, please read the
+# header note.
+#Thu Apr 18 10:48:51 HKT 2024
+sdk.dir=C\:\\Users\\wing3\\AppData\\Local\\Android\\Sdk