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Use file scoped namespaces. (#77854)
Harden BuildHost interactions (#84745)
Tighten up how we shut down build hosts
Disallow applying updates to FBA MSBuildWorkspace (#84722)
[BuildHost] Move RPC contracts to a separate assembly (#81643)
Embed Workspaces.MSBuild.Contracts into the Workspaces.MSBuild NuGet
Move all the MSBuild Workspace projects under a single folder.