PR #2457 - zbalkan/docs

Updated Microsoft.Extensions.Hosting from 10.0.10 to 10.0.12.

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Updated ModelContextProtocol from 2.1.0 to 2.2.0.

Release notes

Sourced from ModelContextProtocol's releases.

2.2.0

This release adds hybrid stateful/stateless HTTP serving so clients using the 2025-11-25 and 2026-07-28 protocol revisions can share an endpoint, and fixes a malformed header-decoding edge case.

What's Changed

Add HttpServerSessionMode for hybrid stateful/stateless HTTP serving #1796 by @saicharanpardhu (co-authored by @Copilot @jeffhandley)
Fix McpHeaderEncoder.DecodeValue throwing on the degenerate base64 wrapper #1805 by @latent-9

Test Improvements

Fix duplicated word in test comment #1809 by @latent-9

Repository Infrastructure Updates

Enable package validation for the MCP extension packages #1793 by @jeffhandley (co-authored by @Copilot)
Add a release-manager agent that orchestrates the release skills #1794 by @jeffhandley (co-authored by @Copilot)
Bump Anthropic from 12.39.0 to 12.40.0 #1808
Bump @hono/node-server from 1.19.14 to 2.1.0 in the npm_and_yarn group across 1 directory #1812
Fix dead relative link to versioning docs in bump-version skill #1807 by @latent-9

Acknowledgements

@latent-9 made their first contribution in #1807
@saicharanpardhu made their first contribution in #1796
@saicharanpardhu submitted issue #1777 (resolved by #1796)
@jeffhandley @tarekgh @halter73 reviewed pull requests

Full Changelog: https://github.com/modelcontextprotocol/csharp-sdk/compare/v2.1.0...v2.2.0

[!NOTE]
These release notes were drafted with GitHub Copilot and reviewed before publishing.

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Summary by cubic

Bumps Microsoft.Extensions.Hosting from 10.0.10 to 10.0.12 and ModelContextProtocol from 2.1.0 to 2.2.0 in the .NET MCP server sample. The ModelContextProtocol update adds hybrid HTTP serving and a header-decoding fix.