diff --git a/eng/Packages.Data.props b/eng/Packages.Data.props
index 29752b576f39..e92cb14ec898 100644
--- a/eng/Packages.Data.props
+++ b/eng/Packages.Data.props
@@ -176,7 +176,7 @@
     All should have PrivateAssets="All" set so they don't become package dependencies
   -->
   <ItemGroup>
-    <PackageReference Update="Microsoft.Azure.AutoRest.CSharp" Version="3.0.0-beta.20230928.1" PrivateAssets="All" />
+    <PackageReference Update="Microsoft.Azure.AutoRest.CSharp" Version="3.0.0-alpha.20231007.1" PrivateAssets="All" />
     <PackageReference Update="Azure.ClientSdk.Analyzers" Version="0.1.1-dev.20230927.2" PrivateAssets="All" />
     <PackageReference Update="coverlet.collector" Version="3.2.0" PrivateAssets="All" />
     <PackageReference Update="Microsoft.CodeAnalysis.NetAnalyzers" Version="7.0.1" PrivateAssets="All" />
diff --git a/eng/emitter-package.json b/eng/emitter-package.json
index baea717ce990..6d73189559de 100644
--- a/eng/emitter-package.json
+++ b/eng/emitter-package.json
@@ -1,6 +1,6 @@
 {
     "main": "dist/src/index.js",
     "dependencies": {
-      "@azure-tools/typespec-csharp": "0.2.0-beta.20230928.1"
+      "@azure-tools/typespec-csharp": "0.2.0-alpha.20231007.1"
     }
 }
diff --git a/sdk/anomalydetector/Azure.AI.AnomalyDetector/src/Generated/AnomalyDetectorClient.cs b/sdk/anomalydetector/Azure.AI.AnomalyDetector/src/Generated/AnomalyDetectorClient.cs
index 0b8e5f6a61bb..8b0a9cf181a4 100644
--- a/sdk/anomalydetector/Azure.AI.AnomalyDetector/src/Generated/AnomalyDetectorClient.cs
+++ b/sdk/anomalydetector/Azure.AI.AnomalyDetector/src/Generated/AnomalyDetectorClient.cs
@@ -150,7 +150,8 @@ public virtual async Task<Response<UnivariateLastDetectionResult>> DetectUnivari
             Argument.AssertNotNull(options, nameof(options));
 
             RequestContext context = FromCancellationToken(cancellationToken);
-            Response response = await DetectUnivariateLastPointAsync(options.ToRequestContent(), context).ConfigureAwait(false);
+            using RequestContent content = options.ToRequestContent();
+            Response response = await DetectUnivariateLastPointAsync(content, context).ConfigureAwait(false);
             return Response.FromValue(UnivariateLastDetectionResult.FromResponse(response), response);
         }
 
@@ -168,7 +169,8 @@ public virtual Response<UnivariateLastDetectionResult> DetectUnivariateLastPoint
             Argument.AssertNotNull(options, nameof(options));
 
             RequestContext context = FromCancellationToken(cancellationToken);
-            Response response = DetectUnivariateLastPoint(options.ToRequestContent(), context);
+            using RequestContent content = options.ToRequestContent();
+            Response response = DetectUnivariateLastPoint(content, context);
             return Response.FromValue(UnivariateLastDetectionResult.FromResponse(response), response);
         }
 
@@ -261,7 +263,8 @@ public virtual async Task<Response<UnivariateChangePointDetectionResult>> Detect
             Argument.AssertNotNull(options, nameof(options));
 
             RequestContext context = FromCancellationToken(cancellationToken);
-            Response response = await DetectUnivariateChangePointAsync(options.ToRequestContent(), context).ConfigureAwait(false);
+            using RequestContent content = options.ToRequestContent();
+            Response response = await DetectUnivariateChangePointAsync(content, context).ConfigureAwait(false);
             return Response.FromValue(UnivariateChangePointDetectionResult.FromResponse(response), response);
         }
 
@@ -276,7 +279,8 @@ public virtual Response<UnivariateChangePointDetectionResult> DetectUnivariateCh
             Argument.AssertNotNull(options, nameof(options));
 
             RequestContext context = FromCancellationToken(cancellationToken);
-            Response response = DetectUnivariateChangePoint(options.ToRequestContent(), context);
+            using RequestContent content = options.ToRequestContent();
+            Response response = DetectUnivariateChangePoint(content, context);
             return Response.FromValue(UnivariateChangePointDetectionResult.FromResponse(response), response);
         }
 
@@ -482,7 +486,8 @@ public virtual async Task<Response<AnomalyDetectionModel>> TrainMultivariateMode
             Argument.AssertNotNull(modelInfo, nameof(modelInfo));
 
             RequestContext context = FromCancellationToken(cancellationToken);
-            Response response = await TrainMultivariateModelAsync(modelInfo.ToRequestContent(), context).ConfigureAwait(false);
+            using RequestContent content = modelInfo.ToRequestContent();
+            Response response = await TrainMultivariateModelAsync(content, context).ConfigureAwait(false);
             return Response.FromValue(AnomalyDetectionModel.FromResponse(response), response);
         }
 
@@ -508,7 +513,8 @@ public virtual Response<AnomalyDetectionModel> TrainMultivariateModel(ModelInfo
             Argument.AssertNotNull(modelInfo, nameof(modelInfo));
 
             RequestContext context = FromCancellationToken(cancellationToken);
-            Response response = TrainMultivariateModel(modelInfo.ToRequestContent(), context);
+            using RequestContent content = modelInfo.ToRequestContent();
+            Response response = TrainMultivariateModel(content, context);
             return Response.FromValue(AnomalyDetectionModel.FromResponse(response), response);
         }
 
@@ -801,7 +807,8 @@ public virtual async Task<Response<MultivariateDetectionResult>> DetectMultivari
             Argument.AssertNotNull(options, nameof(options));
 
             RequestContext context = FromCancellationToken(cancellationToken);
-            Response response = await DetectMultivariateBatchAnomalyAsync(modelId, options.ToRequestContent(), context).ConfigureAwait(false);
+            using RequestContent content = options.ToRequestContent();
+            Response response = await DetectMultivariateBatchAnomalyAsync(modelId, content, context).ConfigureAwait(false);
             return Response.FromValue(MultivariateDetectionResult.FromResponse(response), response);
         }
 
@@ -826,7 +833,8 @@ public virtual Response<MultivariateDetectionResult> DetectMultivariateBatchAnom
             Argument.AssertNotNull(options, nameof(options));
 
             RequestContext context = FromCancellationToken(cancellationToken);
-            Response response = DetectMultivariateBatchAnomaly(modelId, options.ToRequestContent(), context);
+            using RequestContent content = options.ToRequestContent();
+            Response response = DetectMultivariateBatchAnomaly(modelId, content, context);
             return Response.FromValue(MultivariateDetectionResult.FromResponse(response), response);
         }
 
@@ -933,7 +941,8 @@ public virtual async Task<Response<MultivariateLastDetectionResult>> DetectMulti
             Argument.AssertNotNull(options, nameof(options));
 
             RequestContext context = FromCancellationToken(cancellationToken);
-            Response response = await DetectMultivariateLastAnomalyAsync(modelId, options.ToRequestContent(), context).ConfigureAwait(false);
+            using RequestContent content = options.ToRequestContent();
+            Response response = await DetectMultivariateLastAnomalyAsync(modelId, content, context).ConfigureAwait(false);
             return Response.FromValue(MultivariateLastDetectionResult.FromResponse(response), response);
         }
 
@@ -956,7 +965,8 @@ public virtual Response<MultivariateLastDetectionResult> DetectMultivariateLastA
             Argument.AssertNotNull(options, nameof(options));
 
             RequestContext context = FromCancellationToken(cancellationToken);
-            Response response = DetectMultivariateLastAnomaly(modelId, options.ToRequestContent(), context);
+            using RequestContent content = options.ToRequestContent();
+            Response response = DetectMultivariateLastAnomaly(modelId, content, context);
             return Response.FromValue(MultivariateLastDetectionResult.FromResponse(response), response);
         }
 
diff --git a/sdk/contentsafety/Azure.AI.ContentSafety/src/Generated/ContentSafetyClient.cs b/sdk/contentsafety/Azure.AI.ContentSafety/src/Generated/ContentSafetyClient.cs
index 5cf374ddc9a3..44e41bd84a12 100644
--- a/sdk/contentsafety/Azure.AI.ContentSafety/src/Generated/ContentSafetyClient.cs
+++ b/sdk/contentsafety/Azure.AI.ContentSafety/src/Generated/ContentSafetyClient.cs
@@ -79,7 +79,8 @@ public virtual async Task<Response<AnalyzeTextResult>> AnalyzeTextAsync(AnalyzeT
             Argument.AssertNotNull(body, nameof(body));
 
             RequestContext context = FromCancellationToken(cancellationToken);
-            Response response = await AnalyzeTextAsync(body.ToRequestContent(), context).ConfigureAwait(false);
+            using RequestContent content = body.ToRequestContent();
+            Response response = await AnalyzeTextAsync(content, context).ConfigureAwait(false);
             return Response.FromValue(AnalyzeTextResult.FromResponse(response), response);
         }
 
@@ -94,7 +95,8 @@ public virtual Response<AnalyzeTextResult> AnalyzeText(AnalyzeTextOptions body,
             Argument.AssertNotNull(body, nameof(body));
 
             RequestContext context = FromCancellationToken(cancellationToken);
-            Response response = AnalyzeText(body.ToRequestContent(), context);
+            using RequestContent content = body.ToRequestContent();
+            Response response = AnalyzeText(content, context);
             return Response.FromValue(AnalyzeTextResult.FromResponse(response), response);
         }
 
@@ -187,7 +189,8 @@ public virtual async Task<Response<AnalyzeImageResult>> AnalyzeImageAsync(Analyz
             Argument.AssertNotNull(body, nameof(body));
 
             RequestContext context = FromCancellationToken(cancellationToken);
-            Response response = await AnalyzeImageAsync(body.ToRequestContent(), context).ConfigureAwait(false);
+            using RequestContent content = body.ToRequestContent();
+            Response response = await AnalyzeImageAsync(content, context).ConfigureAwait(false);
             return Response.FromValue(AnalyzeImageResult.FromResponse(response), response);
         }
 
@@ -202,7 +205,8 @@ public virtual Response<AnalyzeImageResult> AnalyzeImage(AnalyzeImageOptions bod
             Argument.AssertNotNull(body, nameof(body));
 
             RequestContext context = FromCancellationToken(cancellationToken);
-            Response response = AnalyzeImage(body.ToRequestContent(), context);
+            using RequestContent content = body.ToRequestContent();
+            Response response = AnalyzeImage(content, context);
             return Response.FromValue(AnalyzeImageResult.FromResponse(response), response);
         }
 
@@ -556,7 +560,8 @@ public virtual async Task<Response<AddBlockItemsResult>> AddBlockItemsAsync(stri
             Argument.AssertNotNull(addBlockItemsOptions, nameof(addBlockItemsOptions));
 
             RequestContext context = FromCancellationToken(cancellationToken);
-            Response response = await AddBlockItemsAsync(blocklistName, addBlockItemsOptions.ToRequestContent(), context).ConfigureAwait(false);
+            using RequestContent content = addBlockItemsOptions.ToRequestContent();
+            Response response = await AddBlockItemsAsync(blocklistName, content, context).ConfigureAwait(false);
             return Response.FromValue(AddBlockItemsResult.FromResponse(response), response);
         }
 
@@ -574,7 +579,8 @@ public virtual Response<AddBlockItemsResult> AddBlockItems(string blocklistName,
             Argument.AssertNotNull(addBlockItemsOptions, nameof(addBlockItemsOptions));
 
             RequestContext context = FromCancellationToken(cancellationToken);
-            Response response = AddBlockItems(blocklistName, addBlockItemsOptions.ToRequestContent(), context);
+            using RequestContent content = addBlockItemsOptions.ToRequestContent();
+            Response response = AddBlockItems(blocklistName, content, context);
             return Response.FromValue(AddBlockItemsResult.FromResponse(response), response);
         }
 
@@ -676,7 +682,8 @@ public virtual async Task<Response> RemoveBlockItemsAsync(string blocklistName,
             Argument.AssertNotNull(removeBlockItemsOptions, nameof(removeBlockItemsOptions));
 
             RequestContext context = FromCancellationToken(cancellationToken);
-            Response response = await RemoveBlockItemsAsync(blocklistName, removeBlockItemsOptions.ToRequestContent(), context).ConfigureAwait(false);
+            using RequestContent content = removeBlockItemsOptions.ToRequestContent();
+            Response response = await RemoveBlockItemsAsync(blocklistName, content, context).ConfigureAwait(false);
             return response;
         }
 
@@ -694,7 +701,8 @@ public virtual Response RemoveBlockItems(string blocklistName, RemoveBlockItemsO
             Argument.AssertNotNull(removeBlockItemsOptions, nameof(removeBlockItemsOptions));
 
             RequestContext context = FromCancellationToken(cancellationToken);
-            Response response = RemoveBlockItems(blocklistName, removeBlockItemsOptions.ToRequestContent(), context);
+            using RequestContent content = removeBlockItemsOptions.ToRequestContent();
+            Response response = RemoveBlockItems(blocklistName, content, context);
             return response;
         }
 
diff --git a/sdk/healthinsights/Azure.Health.Insights.CancerProfiling/src/Generated/CancerProfilingClient.cs b/sdk/healthinsights/Azure.Health.Insights.CancerProfiling/src/Generated/CancerProfilingClient.cs
index 6a93da6a078f..368a01f697a4 100644
--- a/sdk/healthinsights/Azure.Health.Insights.CancerProfiling/src/Generated/CancerProfilingClient.cs
+++ b/sdk/healthinsights/Azure.Health.Insights.CancerProfiling/src/Generated/CancerProfilingClient.cs
@@ -73,7 +73,8 @@ public virtual async Task<Operation<OncoPhenotypeResult>> InferCancerProfileAsyn
             Argument.AssertNotNull(oncoPhenotypeData, nameof(oncoPhenotypeData));
 
             RequestContext context = FromCancellationToken(cancellationToken);
-            Operation<BinaryData> response = await InferCancerProfileAsync(waitUntil, oncoPhenotypeData.ToRequestContent(), context).ConfigureAwait(false);
+            using RequestContent content = oncoPhenotypeData.ToRequestContent();
+            Operation<BinaryData> response = await InferCancerProfileAsync(waitUntil, content, context).ConfigureAwait(false);
             return ProtocolOperationHelpers.Convert(response, OncoPhenotypeResult.FromResponse, ClientDiagnostics, "CancerProfilingClient.InferCancerProfile");
         }
 
@@ -89,7 +90,8 @@ public virtual Operation<OncoPhenotypeResult> InferCancerProfile(WaitUntil waitU
             Argument.AssertNotNull(oncoPhenotypeData, nameof(oncoPhenotypeData));
 
             RequestContext context = FromCancellationToken(cancellationToken);
-            Operation<BinaryData> response = InferCancerProfile(waitUntil, oncoPhenotypeData.ToRequestContent(), context);
+            using RequestContent content = oncoPhenotypeData.ToRequestContent();
+            Operation<BinaryData> response = InferCancerProfile(waitUntil, content, context);
             return ProtocolOperationHelpers.Convert(response, OncoPhenotypeResult.FromResponse, ClientDiagnostics, "CancerProfilingClient.InferCancerProfile");
         }
 
diff --git a/sdk/healthinsights/Azure.Health.Insights.ClinicalMatching/src/Generated/ClinicalMatchingClient.cs b/sdk/healthinsights/Azure.Health.Insights.ClinicalMatching/src/Generated/ClinicalMatchingClient.cs
index 3984bf1f11ae..531050542978 100644
--- a/sdk/healthinsights/Azure.Health.Insights.ClinicalMatching/src/Generated/ClinicalMatchingClient.cs
+++ b/sdk/healthinsights/Azure.Health.Insights.ClinicalMatching/src/Generated/ClinicalMatchingClient.cs
@@ -73,7 +73,8 @@ public virtual async Task<Operation<TrialMatcherResult>> MatchTrialsAsync(WaitUn
             Argument.AssertNotNull(trialMatcherData, nameof(trialMatcherData));
 
             RequestContext context = FromCancellationToken(cancellationToken);
-            Operation<BinaryData> response = await MatchTrialsAsync(waitUntil, trialMatcherData.ToRequestContent(), context).ConfigureAwait(false);
+            using RequestContent content = trialMatcherData.ToRequestContent();
+            Operation<BinaryData> response = await MatchTrialsAsync(waitUntil, content, context).ConfigureAwait(false);
             return ProtocolOperationHelpers.Convert(response, TrialMatcherResult.FromResponse, ClientDiagnostics, "ClinicalMatchingClient.MatchTrials");
         }
 
@@ -89,7 +90,8 @@ public virtual Operation<TrialMatcherResult> MatchTrials(WaitUntil waitUntil, Tr
             Argument.AssertNotNull(trialMatcherData, nameof(trialMatcherData));
 
             RequestContext context = FromCancellationToken(cancellationToken);
-            Operation<BinaryData> response = MatchTrials(waitUntil, trialMatcherData.ToRequestContent(), context);
+            using RequestContent content = trialMatcherData.ToRequestContent();
+            Operation<BinaryData> response = MatchTrials(waitUntil, content, context);
             return ProtocolOperationHelpers.Convert(response, TrialMatcherResult.FromResponse, ClientDiagnostics, "ClinicalMatchingClient.MatchTrials");
         }
 
diff --git a/sdk/openai/Azure.AI.OpenAI/src/Generated/OpenAIClient.cs b/sdk/openai/Azure.AI.OpenAI/src/Generated/OpenAIClient.cs
index 5c9517355a94..e104ca9fd681 100644
--- a/sdk/openai/Azure.AI.OpenAI/src/Generated/OpenAIClient.cs
+++ b/sdk/openai/Azure.AI.OpenAI/src/Generated/OpenAIClient.cs
@@ -47,7 +47,8 @@ internal virtual async Task<Operation<BatchImageGenerationOperationResponse>> Be
             Argument.AssertNotNull(imageGenerationOptions, nameof(imageGenerationOptions));
 
             RequestContext context = FromCancellationToken(cancellationToken);
-            Operation<BinaryData> response = await BeginAzureBatchImageGenerationAsync(waitUntil, imageGenerationOptions.ToRequestContent(), context).ConfigureAwait(false);
+            using RequestContent content = imageGenerationOptions.ToRequestContent();
+            Operation<BinaryData> response = await BeginAzureBatchImageGenerationAsync(waitUntil, content, context).ConfigureAwait(false);
             return ProtocolOperationHelpers.Convert(response, BatchImageGenerationOperationResponse.FromResponse, ClientDiagnostics, "OpenAIClient.BeginAzureBatchImageGeneration");
         }
 
@@ -61,7 +62,8 @@ internal virtual Operation<BatchImageGenerationOperationResponse> BeginAzureBatc
             Argument.AssertNotNull(imageGenerationOptions, nameof(imageGenerationOptions));
 
             RequestContext context = FromCancellationToken(cancellationToken);
-            Operation<BinaryData> response = BeginAzureBatchImageGeneration(waitUntil, imageGenerationOptions.ToRequestContent(), context);
+            using RequestContent content = imageGenerationOptions.ToRequestContent();
+            Operation<BinaryData> response = BeginAzureBatchImageGeneration(waitUntil, content, context);
             return ProtocolOperationHelpers.Convert(response, BatchImageGenerationOperationResponse.FromResponse, ClientDiagnostics, "OpenAIClient.BeginAzureBatchImageGeneration");
         }