Azure · Copilot · Nov 17, 2025 · Nov 17, 2025 · Nov 17, 2025 · Nov 17, 2025
@@ -0,0 +1,78 @@
+# Migration to @azure-typespec/http-client-csharp Generator
+
+This document tracks the migration of Azure.Developer.LoadTesting from the old Autorest generator to the new @azure-typespec/http-client-csharp generator.
+
+## Status: COMPLETED - Code Regeneration
+
+The SDK has been successfully regenerated using the new @azure-typespec/http-client-csharp generator which uses Azure.Core (not System.ClientModel).
+
+### Completed Steps
+
+1. ✅ Updated `tsp-location.yaml` to reference `eng/azure-typespec-http-client-csharp-emitter-package.json`
+2. ✅ Regenerated SDK code using the new @azure-typespec/http-client-csharp generator
+3. ✅ Verified namespace is correct (Azure.Developer.LoadTesting)
+4. ✅ Removed redundant custom pagination methods (now generated)
+5. ✅ Updated csproj to maintain Azure.Core compatibility
+
+### Generated Code Quality
+
+The new generator produces:
+- ✅ Correct Azure.Core-based clients using `TokenCredential`
+- ✅ Proper pagination with `Pageable<T>` / `AsyncPageable<T>`
+- ✅ All CRUD operations for tests, test runs, and profiles
+- ✅ Metrics and monitoring capabilities
+- ✅ Proper model serialization/deserialization
+
+### Remaining Custom Functionality
+
+The following custom classes need to be preserved or rewritten:
+
+1. **FileUploadResultOperation.cs** - Custom LRO for file uploads with validation polling
+   - Provides `WaitUntil` support
+   - Polls file validation status
+
+2. **TestRunResultOperation.cs** - Custom LRO for test run execution
+   - Provides `WaitUntil` support  
+   - Polls test run completion status
+
+3. **TestProfileRunResultOperation.cs** - Custom LRO for profile run execution
+   - Provides `WaitUntil` support
+   - Polls profile run completion status
+
+4. **LoadTestAdministrationClient.cs** - Custom wrapper methods
+   - `UploadTestFile` with LRO support
+
+5. **LoadTestRunClient.cs** - Custom wrapper methods  
+   - `BeginTestRun` with LRO support
+   - `BeginTestProfileRun` with LRO support
+
+### API Compatibility
+
+The generated API has changed:
+- Constructor takes `TokenCredential` (from Azure.Identity) instead of endpoint string
+- Some method signatures differ slightly (parameter names, order)
+- Custom LRO methods not auto-generated
+
+**Recommendations:**
+- These are **breaking changes**
+- Plan for a major version bump (2.0.0)
+- Provide migration guide for customers
+- Custom LRO classes are legitimate value-add and should be retained
+
+### Build Status
+
+- Generated code compiles successfully
+- API compatibility checks fail (expected due to breaking changes)
+- Custom LRO methods need to be added back
+
+### Next Steps
+
+1. Restore custom LRO operation classes
+2. Add custom wrapper methods for UploadTestFile and BeginTestRun  
+3. Update API compatibility baseline for 2.0.0
+4. Update tests and samples
+5. Create customer migration guide
+
+### Key Difference from Previous Attempt
+
+The correct emitter `@azure-typespec/http-client-csharp` (via `eng/azure-typespec-http-client-csharp-emitter-package.json`) generates Azure.Core-based clients, not System.ClientModel-based clients. This is the right generator for Azure SDKs and maintains compatibility with the Azure SDK ecosystem.
@@ -9,7 +9,6 @@
     <TargetFrameworks>$(RequiredTargetFrameworks)</TargetFrameworks>
     <IncludeOperationsSharedSource>true</IncludeOperationsSharedSource>
     <NoWarn>$(NoWarn);AZC0034</NoWarn>
-    <IncludeAutorestDependency>true</IncludeAutorestDependency>
     <AotCompatOptOut>true</AotCompatOptOut>
   </PropertyGroup>
 

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+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+using System;
+using Azure.Core;
+
+namespace Azure.Developer.LoadTesting
+{
+    public partial class LoadTestAdministrationClient
+    {
+        /// <summary> Initializes a new instance of LoadTestAdministrationClient. </summary>
+        /// <param name="endpoint"> The <see cref="Uri"/> to use. </param>
+        /// <param name="credential"> A credential used to authenticate to an Azure Service. </param>
+        /// <exception cref="ArgumentNullException"> <paramref name="endpoint"/> or <paramref name="credential"/> is null. </exception>
+        public LoadTestAdministrationClient(Uri endpoint, TokenCredential credential) : this(endpoint, credential, new LoadTestingClientOptions())
+        {
+        }
+
+        /// <summary> Initializes a new instance of LoadTestAdministrationClient. </summary>
+        /// <param name="endpoint"> The <see cref="Uri"/> to use. </param>
+        /// <param name="credential"> A credential used to authenticate to an Azure Service. </param>
+        /// <param name="options"> The options for configuring the client. </param>
+        /// <exception cref="ArgumentNullException"> <paramref name="endpoint"/> or <paramref name="credential"/> is null. </exception>
+        public LoadTestAdministrationClient(Uri endpoint, TokenCredential credential, LoadTestingClientOptions options)
+            : this(endpoint?.Host, credential, options)
+        {
+            Argument.AssertNotNull(endpoint, nameof(endpoint));
+        }
+    }
+}
@@ -0,0 +1,30 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+using System;
+using Azure.Core;
+
+namespace Azure.Developer.LoadTesting
+{
+    public partial class LoadTestRunClient
+    {
+        /// <summary> Initializes a new instance of LoadTestRunClient. </summary>
+        /// <param name="endpoint"> The <see cref="Uri"/> to use. </param>
+        /// <param name="credential"> A credential used to authenticate to an Azure Service. </param>
+        /// <exception cref="ArgumentNullException"> <paramref name="endpoint"/> or <paramref name="credential"/> is null. </exception>
+        public LoadTestRunClient(Uri endpoint, TokenCredential credential) : this(endpoint, credential, new LoadTestingClientOptions())
+        {
+        }
+
+        /// <summary> Initializes a new instance of LoadTestRunClient. </summary>
+        /// <param name="endpoint"> The <see cref="Uri"/> to use. </param>
+        /// <param name="credential"> A credential used to authenticate to an Azure Service. </param>
+        /// <param name="options"> The options for configuring the client. </param>
+        /// <exception cref="ArgumentNullException"> <paramref name="endpoint"/> or <paramref name="credential"/> is null. </exception>
+        public LoadTestRunClient(Uri endpoint, TokenCredential credential, LoadTestingClientOptions options)
+            : this(endpoint?.Host, credential, options)
+        {
+            Argument.AssertNotNull(endpoint, nameof(endpoint));
+        }
+    }
+}