diff --git a/dotnet/samples/AGUIClientServer/AGUIDojoServer/Program.cs b/dotnet/samples/AGUIClientServer/AGUIDojoServer/Program.cs
index 7e9ccca9b9..d853593a78 100644
--- a/dotnet/samples/AGUIClientServer/AGUIDojoServer/Program.cs
+++ b/dotnet/samples/AGUIClientServer/AGUIDojoServer/Program.cs
@@ -1,7 +1,6 @@
 // Copyright (c) Microsoft. All rights reserved.
 
 using AGUIDojoServer;
-using Microsoft.Agents.AI.Hosting.AGUI.AspNetCore;
 using Microsoft.AspNetCore.HttpLogging;
 using Microsoft.Extensions.Options;
 
diff --git a/dotnet/samples/AGUIClientServer/AGUIServer/Program.cs b/dotnet/samples/AGUIClientServer/AGUIServer/Program.cs
index 4ecf9a8429..73f5dc4b34 100644
--- a/dotnet/samples/AGUIClientServer/AGUIServer/Program.cs
+++ b/dotnet/samples/AGUIClientServer/AGUIServer/Program.cs
@@ -4,7 +4,6 @@ using System.ComponentModel;
 using AGUIServer;
 using Azure.AI.OpenAI;
 using Azure.Identity;
-using Microsoft.Agents.AI.Hosting.AGUI.AspNetCore;
 using Microsoft.Extensions.AI;
 using OpenAI;
 
diff --git a/dotnet/src/Microsoft.Agents.AI.Hosting.AGUI.AspNetCore/AGUIEndpointRouteBuilderExtensions.cs b/dotnet/src/Microsoft.Agents.AI.Hosting.AGUI.AspNetCore/AGUIEndpointRouteBuilderExtensions.cs
index 1c3891e54b..0dc139cb69 100644
--- a/dotnet/src/Microsoft.Agents.AI.Hosting.AGUI.AspNetCore/AGUIEndpointRouteBuilderExtensions.cs
+++ b/dotnet/src/Microsoft.Agents.AI.Hosting.AGUI.AspNetCore/AGUIEndpointRouteBuilderExtensions.cs
@@ -4,6 +4,7 @@ using System;
 using System.Collections.Generic;
 using System.Diagnostics.CodeAnalysis;
 using System.Linq;
+using System.Text.Json;
 using System.Threading;
 using Microsoft.Agents.AI;
 using Microsoft.Agents.AI.Hosting;
@@ -109,8 +110,8 @@ public static class MicrosoftAgentAIHostingAGUIEndpointRouteBuilderExtensions
                 return Results.BadRequest();
             }
 
-            IOptions<Microsoft.AspNetCore.Http.Json.JsonOptions> jsonOptions = context.RequestServices.GetRequiredService<IOptions<Microsoft.AspNetCore.Http.Json.JsonOptions>>();
-            System.Text.Json.JsonSerializerOptions jsonSerializerOptions = jsonOptions.Value.SerializerOptions;
+            IOptions<Http.Json.JsonOptions> jsonOptions = context.RequestServices.GetRequiredService<IOptions<Http.Json.JsonOptions>>();
+            JsonSerializerOptions jsonSerializerOptions = jsonOptions.Value.SerializerOptions;
 
             IEnumerable<ChatMessage> messages = input.Messages.AsChatMessages(jsonSerializerOptions);
             List<AITool>? clientTools = input.Tools?.AsAITools().ToList();
diff --git a/dotnet/tests/Microsoft.Agents.AI.Hosting.AGUI.AspNetCore.UnitTests/MapAGUIEndpointRouteBuilderExtensionsTests.cs b/dotnet/tests/Microsoft.Agents.AI.Hosting.AGUI.AspNetCore.UnitTests/MapAGUIEndpointRouteBuilderExtensionsTests.cs
index 750958b912..6108624110 100644
--- a/dotnet/tests/Microsoft.Agents.AI.Hosting.AGUI.AspNetCore.UnitTests/MapAGUIEndpointRouteBuilderExtensionsTests.cs
+++ b/dotnet/tests/Microsoft.Agents.AI.Hosting.AGUI.AspNetCore.UnitTests/MapAGUIEndpointRouteBuilderExtensionsTests.cs
@@ -1,4 +1,4 @@
-// Copyright (c) Microsoft. All rights reserved.
+// Copyright (c) Microsoft. All rights reserved.
 
 using System;
 using Microsoft.AspNetCore.Builder;