[release/8.0-staging] Special casing System.Guid for COM VARIANT marshalling
#100734
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* Support System.Guid marshalling via VARIANT VARIANT marshalling in .NET 5+ requires a TLB for COM records (i.e., ValueType instances). This means that without a runtime provided TLB, users must define their own TLB for runtime types or define their own transfer types. We address this here by deferring to the NetFX mscorlib's TLB. Co-authored-by: Elinor Fung <elfung@microsoft.com>
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System.Guid for COM VARIANT marshalling (#100377)System.Guid for COM VARIANT marshalling
This was referenced Apr 7, 2024
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elinor-fung
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Apr 9, 2024
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This change should be treated as a backport of a new feature. As a rule, we do not backport new features, backporting features requires an exception. If the exception is granted for this backport, we should consider placing the backported feature under a switch that is not enabled by default. |
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Draft Pull Request was automatically closed for 30 days of inactivity. Please let us know if you'd like to reopen it. |
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Backport of #100377 to release/8.0-staging
Customer Impact
VARIANT marshalling in .NET 5+ requires a TLB
for COM records (i.e., ValueType instances). This
means that without a runtime provided TLB, users
must define their own TLB for runtime types or
define their own transfer types.
We address this here by deferring to the NetFX
mscorlib's TLB.
Regression
This support has never been in .NET Core 3.1/.NET 5+. This is helping porting efforts from .NET Framework to .NET 5+.
Risk
Low, this is enabling a narrow feature that was present in .NET Framework.