Fix object expressions in struct types generating invalid IL with byref fields#19070

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Copilot wants to merge 6 commits intomainfrom

copilot/fix-invalid-il-byref-fields

Commits on Nov 11, 2025

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Fix object expressions in struct types generating invalid IL with byref fields

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T-Gro
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Add IsInstanceMember check to only transform instance members of structs

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T-Gro
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Add interface check to prevent transformation for pure interface implementations

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T-Gro
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Refactor struct object expression fix to CheckExpressionsOps with clear early guards

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T-Gro
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Fix type inference issue by removing explicit generic type annotation

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T-Gro
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