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UnwindNativeCode isn't supported on Apple targets

In .NET 11, UnwindNativeCode isn't supported on Apple targets.

Version introduced

.NET 11

Previous behavior

Apple projects that used Mono could set MarshalManagedExceptionMode=UnwindNativeCode.

New behavior

CoreCLR doesn't support MarshalManagedExceptionMode=UnwindNativeCode. The Apple workload reports error 0185.

Type of breaking change

This change affects source compatibility and is a behavioral change.

Reason for change

CoreCLR doesn't support unwinding managed exceptions through native stack frames in this mode.

  • Remove MarshalManagedExceptionMode=UnwindNativeCode.
  • Catch managed exceptions before they cross native code.
  • Return a status value, create an Objective-C exception, or use a supported abort policy.

Affected APIs

None. This change affects the MarshalManagedExceptionMode MSBuild property.

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