fix issue in populate rest opearation arguments.

Author: haiyuazhang

eng/packages/http-client-csharp-mgmt/generator/Azure.Generator.Management/src/Providers/TagMethodProviders/BaseTagMethodProvider.cs

@@ -3,6 +3,7 @@
 
 using Azure.Generator.Management.Extensions;
 using Azure.Generator.Management.Models;
+using Azure.Generator.Management.Primitives;
 using Azure.Generator.Management.Providers.OperationMethodProviders;
 using Azure.Generator.Management.Snippets;
 using Azure.Generator.Management.Utilities;
@@ -170,7 +171,7 @@ protected static MethodBodyStatement GetResourceDataStatements(
             return Declare(
                 variableName,
                 resourceClientProvider.ResourceData.Type,
-                new TupleExpression(This.Invoke(getMethod, [cancellationTokenParam], null, isAsync))
+                new TupleExpression(This.Invoke(getMethod, [KnownAzureParameters.CancellationTokenWithoutDefault.PositionalReference(cancellationTokenParam)], null, isAsync))
                     .Property("Value").Property("Data"),
                 out currentVar);
         }

eng/packages/http-client-csharp-mgmt/generator/Azure.Generator.Management/src/Utilities/RequestPathPatternExtensions.cs

@@ -59,8 +59,15 @@ public static IReadOnlyList<ValueExpression> PopulateArguments(
                 }
                 else
                 {
-                    var methodParam = methodParameters.Single(p => p.WireInfo.SerializedName == parameter.WireInfo.SerializedName);
-                    arguments.Add(Convert(methodParam, methodParam.Type, parameter.Type));
+                    var methodParam = methodParameters.SingleOrDefault(p => p.WireInfo.SerializedName == parameter.WireInfo.SerializedName);
+                    if (methodParam != null)
+                    {
+                        arguments.Add(Convert(methodParam, methodParam.Type, parameter.Type));
+                    }
+                    else
+                    {
+                        arguments.Add(Null);
+                    }
                 }
             }
 

eng/packages/http-client-csharp-mgmt/generator/TestProjects/Local/Mgmt-TypeSpec/databox.tsp

@@ -0,0 +1,56 @@
+import "@typespec/rest";
+import "@typespec/openapi";
+import "@azure-tools/typespec-azure-core";
+import "@azure-tools/typespec-azure-resource-manager";
+
+namespace MgmtTypeSpec;
+
+using TypeSpec.Rest;
+using Azure.ResourceManager;
+using TypeSpec.Http;
+using TypeSpec.OpenAPI;
+
+
+model JobResource
+  is Azure.ResourceManager.TrackedResource<JobProperties, false> {
+  ...ResourceNameParameter<
+    Resource = JobResource,
+    KeyName = "jobName",
+    SegmentName = "jobs",
+    NamePattern = "^[-\\w\\.]+$"
+  >;
+}
+
+model JobProperties {
+    jobName: string;
+}
+
+@armResourceOperations
+interface JobResources {
+  /**
+   * Gets information about the specified job.
+   */
+  get is ArmResourceRead<
+    JobResource,
+    Parameters = {
+      /**
+       * $expand is supported on details parameter for job, which provides details on the job stages.
+       */
+      @query("$expand")
+      $expand?: string;
+    },
+  >;
+
+  #suppress "@azure-tools/typespec-azure-resource-manager/arm-resource-patch" "FIXME: Update justification, follow aka.ms/tsp/conversion-fix for details"
+  @patch(#{ implicitOptionality: false })
+  update is ArmCustomPatchAsync<
+    JobResource,
+    PatchModel = JobResourceUpdateParameter,
+  >;
+}
+
+model JobResourceUpdateParameter {
+    properties?: JobProperties;
+    #suppress "@azure-tools/typespec-azure-resource-manager/arm-no-record" "FIXME: Update justification, follow aka.ms/tsp/conversion-fix for details"
+    tags?: Record<string>;
+}

eng/packages/http-client-csharp-mgmt/generator/TestProjects/Local/Mgmt-TypeSpec/main.tsp

@@ -9,6 +9,7 @@ import "./routes.tsp";
 import "./endpoint.tsp";
 import "./selfhelp.tsp";
 import "./playwright.tsp";
+import "./databox.tsp";
 using TypeSpec.Versioning;
 using Azure.ClientGenerator.Core;
 using Azure.ResourceManager;