Microsoft has introduced the C# SDK for the Model Context Protocol (MCP), making it easier for .NET developers to build AI-powered applications that can interact with external tools and services. Microsoft has released the v1.0 of the official MCP C# SDK on March 5th, 2026.
MCP is an open protocol that allows AI models to securely connect with systems like APIs, databases, and business applications. Instead of building custom integrations for every AI feature, developers can expose functionality as standardized tools that AI agents can discover and use dynamically.
With the new MCP C# SDK, developers can create MCP servers and tools using familiar .NET technologies such as ASP.NET Core, dependency injection, and middleware. This simplifies building intelligent systems where AI can perform real actions for examples retrieving data, updating records, or triggering workflows.
The MCP ecosystem also integrates well with AI orchestration frameworks such as Microsoft Semantic Kernel, enabling developers to build powerful AI agents and automation workflows.
Why the MCP C# SDK Matters for .NET Developers
For .NET developers exploring AI, the MCP C# SDK opens the door to building scalable, secure, and tool-driven AI applications. The release of the MCP C# SDK means .NET developers can now build MCP servers and clients directly in C# without implementing the protocol manually.
This unlocks several possibilities:
- Building AI agents that interact with business systems
- Creating standardized AI tools for internal platforms
- Integrating LLMs with enterprise APIs
- Developing automation workflows powered by AI
Developers can now use familiar .NET technologies like:
- ASP.NET Core
- Dependency Injection
- Middleware pipelines
- Logging and telemetry
while building MCP-based systems.
As AI agents become more common in modern software systems, MCP is quickly emerging as a standard way for AI to interact with real-world tools.
More details on MCP can be found in the previous article here.
References:
- https://devblogs.microsoft.com/dotnet/release-v10-of-the-official-mcp-csharp-sdk/