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   │
└─────────────┘    └─────────────┘    └─────────────┘    └─────────────┘

Create - Scaffold your project, add tools with [McpServerTool] attributes
Debug - Run locally, configure IDE, test with MCP Inspector
Test - Write unit/integration tests, create LLM evaluations
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.

MCP Servers