Mark samples as AOT compatible (#184)

* Revert changes to remove APIs

* Apply suggestions from code review

Co-authored-by: Stephen Toub <stoub@microsoft.com>

---------

Co-authored-by: Stephen Toub <stoub@microsoft.com>

samples/AspNetCoreSseServer/AspNetCoreSseServer.csproj

@@ -4,6 +4,7 @@
     <TargetFramework>net9.0</TargetFramework>
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
+    <PublishAot>true</PublishAot>
   </PropertyGroup>
 
   <ItemGroup>

samples/AspNetCoreSseServer/Program.cs

@@ -1,5 +1,10 @@
+using TestServerWithHosting.Tools;
+
 var builder = WebApplication.CreateBuilder(args);
-builder.Services.AddMcpServer().WithToolsFromAssembly();
+builder.Services.AddMcpServer()
+    .WithTools<EchoTool>()
+    .WithTools<SampleLlmTool>();
+
 var app = builder.Build();
 
 app.MapMcp();

samples/AspNetCoreSseServer/Tools/EchoTool.cs

@@ -4,7 +4,7 @@ using System.ComponentModel;
 namespace TestServerWithHosting.Tools;
 
 [McpServerToolType]
-public static class EchoTool
+public sealed class EchoTool
 {
     [McpServerTool, Description("Echoes the input back to the client.")]
     public static string Echo(string message)

samples/AspNetCoreSseServer/Tools/SampleLlmTool.cs

@@ -8,7 +8,7 @@ namespace TestServerWithHosting.Tools;
 /// This tool uses dependency injection and async method
 /// </summary>
 [McpServerToolType]
-public static class SampleLlmTool
+public sealed class SampleLlmTool
 {
     [McpServerTool(Name = "sampleLLM"), Description("Samples from an LLM using MCP's sampling feature")]
     public static async Task<string> SampleLLM(