MCP C# Skills Collection

A comprehensive set of GitHub Copilot skills for building Model Context Protocol (MCP) servers using C# and .NET.

Overview

These skills guide you through the complete lifecycle of MCP server development - from project creation to cloud deployment. MCP servers enable LLMs to interact with external services through well-designed tools, prompts, and resources.

Skills

Skill	Description
mcp-csharp	Main orchestrator for C# MCP development. Use as your entry point to navigate the complete workflow.
mcp-csharp-create	Create new MCP servers using the official C# SDK and Microsoft templates. Covers stdio and HTTP transports.
mcp-csharp-debug	Run and debug MCP servers locally. Covers VS/VS Code configuration, MCP Inspector, and GitHub Copilot Agent Mode testing.
mcp-csharp-test	Test MCP servers with unit tests, integration tests, and LLM effectiveness evaluations.
mcp-csharp-publish	Publish and deploy MCP servers to NuGet (stdio), Docker, or Azure (HTTP).

Quick Start

Prerequisites

• .NET 10.0 SDK or later
• Visual Studio 2022+ or VS Code with C# Dev Kit
• GitHub Copilot (optional, for Agent Mode testing)

Create Your First MCP Server

# Install the template
dotnet new install Microsoft.McpServer.ProjectTemplates

# Create a stdio server (local/CLI)
dotnet new mcpserver -n MyMcpServer

# Or create an HTTP server (remote/web)
dotnet new mcpserver -n MyMcpServer --transport http

Development Workflow

┌─────────────┐    ┌─────────────┐    ┌─────────────┐    ┌─────────────┐
│   Create    │ →  │    Debug    │ →  │    Test     │ →  │   Publish   │
│  mcp-csharp │    │  mcp-csharp │    │  mcp-csharp │    │  mcp-csharp │
│   -create   │    │   -debug    │    │   -test     │    │  -publish   │
└─────────────┘    └─────────────┘    └─────────────┘    └─────────────┘

1. Create - Scaffold your project, add tools with [McpServerTool] attributes
2. Debug - Run locally, configure IDE, test with MCP Inspector
3. Test - Write unit/integration tests, create LLM evaluations
4. Publish - Deploy to NuGet (stdio) or Docker/Azure (HTTP)

Transport Options

Transport	Use Case	Publish To	Run Command
stdio	Local/CLI integrations	NuGet.org	dnx YourPackage@1.0.0
HTTP	Remote/web services	Docker/Azure	Container URL

Installation

Copy these skill folders to your Copilot skills directory:

• Windows: %USERPROFILE%\.copilot\skills\
• macOS/Linux: ~/.copilot/skills/

License

See individual LICENSE.txt files in each skill folder.