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MCP C# SDK 2.0 is stable: HTTP is stateless by default, and 10 changes can break your upgrade

This story is from 2026-10-26. It is preserved in the archive; the latest stories are on the live feed.

Microsoft announced the stable 2.0 line of the official MCP C# SDK this week, and InfoQ covered the announcement on October 26 . The short version: the SDK now implements the 2026-07-28 spec revision, HTTP transport is stateless by default, and the upgrade carries ten numbered breaking changes. I r…

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  1. 2026-10-26 10:55 · DEV Community — AI
    MCP C# SDK 2.0 is stable: HTTP is stateless by default, and 10 changes can break your upgrade

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