Undo COM support in out of proc task host CLR4#13089
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YuliiaKovalova merged 2 commits intomainfrom Jan 22, 2026
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Pull request overview
This PR reverts COM support in out-of-process task host for .NET Framework 4.x (CLR4) due to issues with Design Time Builds in C++ projects. The change was previously introduced in PR #13033 but is being rolled back pending further investigation.
Changes:
- Modified the
TryCreateExtendedHeaderTypemethod to restrict extended packet headers to .NET (Core/5.0+) task hosts only, excluding .NET Framework 4.x task hosts
rainersigwald
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Jan 22, 2026
YuliiaKovalova
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Feb 25, 2026
Attempt 2 for dotnet#13089 In scope of dotnet#12753 support for translating HostServices in Out of Proc Task Host was added, but limited to NET task host. This change removes this limitation.
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Revert #13033 since it causes issues with DTB in C++.
I will investigate it more