Restucture and add testing for .net8 and .net9

Author: mikekistler

ModelContextProtocol.slnx

@@ -70,6 +70,8 @@
   <Folder Name="/tests/">
     <Project Path="tests/ModelContextProtocol.Analyzers.Tests/ModelContextProtocol.Analyzers.Tests.csproj" />
     <Project Path="tests/ModelContextProtocol.AspNetCore.Tests/ModelContextProtocol.AspNetCore.Tests.csproj" />
+    <Project Path="tests/ModelContextProtocol.ConformanceServer/ModelContextProtocol.ConformanceServer.csproj" />
+    <Project Path="tests/ModelContextProtocol.ConformanceTests/ModelContextProtocol.ConformanceTests.csproj" />
     <Project Path="tests/ModelContextProtocol.TestOAuthServer/ModelContextProtocol.TestOAuthServer.csproj" />
     <Project Path="tests/ModelContextProtocol.Tests/ModelContextProtocol.Tests.csproj" />
     <Project Path="tests/ModelContextProtocol.TestServer/ModelContextProtocol.TestServer.csproj" />

…nformanceServer/ConformanceServer.csproj …ContextProtocol.ConformanceServer.csprojtests/ModelContextProtocol.ConformanceTests/ConformanceServer/ConformanceServer.csproj renamed to tests/ModelContextProtocol.ConformanceServer/ModelContextProtocol.ConformanceServer.csproj tests/ModelContextProtocol.ConformanceTests/ConformanceServer/ConformanceServer.csproj renamed to tests/ModelContextProtocol.ConformanceServer/ModelContextProtocol.ConformanceServer.csproj

@@ -1,13 +1,13 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <TargetFramework>net10.0</TargetFramework>
+    <TargetFrameworks>net10.0;net9.0;net8.0</TargetFrameworks>
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
   </PropertyGroup>
 
   <ItemGroup>
-    <ProjectReference Include="../../../src/ModelContextProtocol.AspNetCore/ModelContextProtocol.AspNetCore.csproj" />
+    <ProjectReference Include="../../src/ModelContextProtocol.AspNetCore/ModelContextProtocol.AspNetCore.csproj" />
   </ItemGroup>
 
 </Project>

…ConformanceServer/ConformanceServer.http …elContextProtocol.ConformanceServer.httptests/ModelContextProtocol.ConformanceTests/ConformanceServer/ConformanceServer.http renamed to tests/ModelContextProtocol.ConformanceServer/ModelContextProtocol.ConformanceServer.http tests/ModelContextProtocol.ConformanceTests/ConformanceServer/ConformanceServer.http renamed to tests/ModelContextProtocol.ConformanceServer/ModelContextProtocol.ConformanceServer.http

@@ -94,4 +94,6 @@ await ctx.Server.SampleAsync([
 
 app.MapMcp();
 
+app.MapGet("/health", () => TypedResults.Ok("Healthy"));
+
 app.Run();

…rmanceTests/ConformanceServer/Program.cs …extProtocol.ConformanceServer/Program.cstests/ModelContextProtocol.ConformanceTests/ConformanceServer/Program.cs renamed to tests/ModelContextProtocol.ConformanceServer/Program.cs tests/ModelContextProtocol.ConformanceTests/ConformanceServer/Program.cs renamed to tests/ModelContextProtocol.ConformanceServer/Program.cs

@@ -189,14 +189,14 @@ public static async Task<string> Sampling(
                 Messages = [new SamplingMessage
                 {
                     Role = Role.User,
-                    Content = new TextContentBlock { Text = prompt },
+                    Content = [new TextContentBlock { Text = prompt }],
                 }],
                 MaxTokens = 100,
                 Temperature = 0.7f
             };
 
             var result = await server.SampleAsync(samplingParams, cancellationToken);
-            return $"Sampling result: {(result.Content as TextContentBlock)?.Text ?? "No text content"}";
+            return $"Sampling result: {(result.Content.FirstOrDefault() as TextContentBlock)?.Text ?? "No text content"}";
         }
         catch (Exception ex)
         {
@@ -279,7 +279,7 @@ public static async Task<string> ElicitationSep1034Defaults(
                         Description = "Score",
                         Default = 95.5
                     },
-                    ["status"] = new ElicitRequestParams.EnumSchema()
+                    ["status"] = new ElicitRequestParams.UntitledSingleSelectEnumSchema()
                     {
                         Description = "Status",
                         Enum = ["active", "inactive", "pending"],
@@ -331,12 +331,12 @@ public static async Task<string> ElicitationSep1330Enums(
             {
                 Properties =
                 {
-                    ["color"] = new ElicitRequestParams.EnumSchema()
+                    ["color"] = new ElicitRequestParams.UntitledSingleSelectEnumSchema()
                     {
                         Description = "Choose a color",
                         Enum = ["red", "green", "blue"]
                     },
-                    ["size"] = new ElicitRequestParams.EnumSchema()
+                    ["size"] = new ElicitRequestParams.UntitledSingleSelectEnumSchema()
                     {
                         Description = "Choose a size",
                         Enum = ["small", "medium", "large"],