Build an MCP Server in C#: Write Tools Once
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The official ModelContextProtocol C# SDK (1.0.0) lets you write tools once and use them in Claude Code via stdio or HTTP — no more copy-pasting tool code between apps. What Changed — The specific update, with version/date if available The official ModelContextProtocol C# SDK hit 1.0.0 (maintained with Microsoft). This is no longer a preview or an experimental wrapper. It's a stable, production-ready way to build MCP servers in .NET. If you've been writing Claude Code tools as inline functions…
1Key Takeaways
- The official ModelContextProtocol C# SDK (1.0.0) lets you write tools once and use them in Claude Code via stdio or HTTP — no more copy-pasting tool code between apps.
- What Changed — The specific update, with version/date if available The official ModelContextProtocol C# SDK hit 1.0.0 (maintained with Microsoft).
- This is no longer a preview or an experimental wrapper.
- It's a stable, production-ready way to build MCP servers in .NET.
2AIWedia Score
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3Why it matters
Coding AI shifts how fast software ships and how much human review each change needs. DEV — ML reports that the official ModelContextProtocol C# SDK (1.0.0) lets you write tools once and use them in Claude Code via stdio or HTTP — no more copy-pasting tool code between apps.
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