add csharp sample

Author: Petermarcu

samples/csharp/Program.cs

@@ -0,0 +1,18 @@
+using System.ClientModel;
+using Todo;
+using Todo.Models;
+
+TodoClient client = new TodoClient(new Uri("http://localhost:3000"), new KeyCredential("token"), new TodoClientOptions());
+TodoItems itemsClient = client.GetItemsClient();
+
+Result<TodoItem> result = await itemsClient.CreateAsync(
+    item: new TodoItem("title", TodoItemStatus.NotStarted)
+    {
+        Labels = BinaryData.FromObjectAsJson(new string[] { "label1", "label2" })
+    }
+);
+
+if (result.Value != null)
+{
+    Console.WriteLine($"Created item with id: {result.Value.Id}");
+}

samples/csharp/csharp-client-app.csproj

@@ -0,0 +1,13 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <RootNamespace>csharp_client_app</RootNamespace>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\..\tsp-output\csharp\src\Todo.csproj" />
+  </ItemGroup>
+</Project>

src/server.ts

@@ -7,10 +7,9 @@ import fastifyReference from "@scalar/fastify-api-reference";
 import { Service } from "./service.js";
 const localFile = (fileName: string) =>
   new URL(fileName, import.meta.url).pathname;
-
 const serviceHandlers = new Service();
 const pluginOptions = {
-  specification: localFile("../tsp-output/@typespec/openapi3/openapi.yaml"),
+  specification: "./tsp-output/@typespec/openapi3/openapi.yaml",
   serviceHandlers,
 };