Fix static member exports to not instantiate declaring type#594

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Copilot wants to merge 8 commits intomainfrom

copilot/fix-593

Commits on Jun 11, 2025

Initial plan for issue
Copilot
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Initial exploration - understand the issue and current codebase

Copilot
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AArnott
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Fix static member exports to not instantiate declaring type

Copilot
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AArnott
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Add comprehensive tests for static member export instantiation behavior

Copilot
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AArnott
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Revert global.json and nuget.config, add MEFv2 support to static member tests

Copilot
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AArnott
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Remove redundant MEF engine flags from static member tests

Copilot
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AArnott
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Remove MEFv2 attributes from static field and method exports

Copilot
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AArnott
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Fix whitespace
AArnott
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