fix the issue

Author: ArcturusZhang

packages/http-client-csharp/generator/Microsoft.Generator.CSharp.ClientModel/src/Providers/ScmMethodProviderCollection.cs

@@ -23,6 +23,7 @@ public class ScmMethodProviderCollection : MethodProviderCollection
     {
         private string _cleanOperationName;
         private readonly MethodProvider _createRequestMethod;
+        private static readonly ClientPipelineExtensionsDefinition _clientPipelineExtensionsDefinition = new();
 
         private ClientProvider Client { get; }
 
@@ -432,7 +433,7 @@ private ScmMethodProvider BuildProtocolMethod(MethodProvider createRequestMethod
             MethodBodyStatement[] methodBody =
             [
                 UsingDeclare("message", ClientModelPlugin.Instance.TypeFactory.HttpMessageApi.HttpMessageType, This.Invoke(createRequestMethod.Signature, [.. requiredParameters, ..optionalParameters, requestOptionsParameter]), out var message),
-                Return(ClientModelPlugin.Instance.TypeFactory.ClientResponseApi.ToExpression().FromResponse(client.PipelineProperty.Invoke(processMessageName, [message, requestOptionsParameter], isAsync, true))),
+                Return(ClientModelPlugin.Instance.TypeFactory.ClientResponseApi.ToExpression().FromResponse(client.PipelineProperty.Invoke(processMessageName, [message, requestOptionsParameter], isAsync, true, extensionType: _clientPipelineExtensionsDefinition.Type))),
             ];
 
             var protocolMethod =

packages/http-client-csharp/generator/Microsoft.Generator.CSharp/src/Snippets/Snippet.cs

@@ -120,28 +120,33 @@ public static InvokeMethodExpression Invoke(this ParameterProvider parameter, st
         public static ValueExpression Property(this ParameterProvider parameter, string propertyName, bool nullConditional = false)
             => new MemberExpression(nullConditional ? new NullConditionalExpression(parameter) : parameter, propertyName);
 
-        public static InvokeMethodExpression Invoke(this FieldProvider field, string methodName, IEnumerable<ValueExpression> parameters)
-            => field.Invoke(methodName, parameters, false, false);
+        public static InvokeMethodExpression Invoke(this FieldProvider field, string methodName, IEnumerable<ValueExpression> parameters, CSharpType? extensionType = null)
+            => field.Invoke(methodName, parameters, false, false, extensionType: extensionType);
 
         public static InvokeMethodExpression Invoke(this FieldProvider field,
             string methodName,
             IEnumerable<ValueExpression> parameters,
             bool isAsync,
-            bool configureAwait)
+            bool configureAwait,
+            CSharpType? extensionType = null)
             => new InvokeMethodExpression(field, methodName, [.. parameters])
             {
-                CallAsAsync = isAsync, AddConfigureAwaitFalse = configureAwait
+                CallAsAsync = isAsync,
+                AddConfigureAwaitFalse = configureAwait,
+                ExtensionType = extensionType
             };
 
         public static ValueExpression Invoke(this PropertyProvider property,
             string methodName,
             IEnumerable<ValueExpression> parameters,
             bool isAsync,
-            bool configureAwait)
+            bool configureAwait,
+            CSharpType? extensionType = null)
             => new InvokeMethodExpression(property, methodName, [.. parameters])
             {
                 CallAsAsync = isAsync,
-                AddConfigureAwaitFalse = configureAwait
+                AddConfigureAwaitFalse = configureAwait,
+                ExtensionType = extensionType
             };
 
         public static ScopedApi<bool> NotEqual(this ParameterProvider parameter, ValueExpression other)