Fix incorrect casting of nullable value types#1036
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This was referenced Feb 19, 2026
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This PR fixes an issue caused by incorrect handling of nullable value types.
When a unary method or Hub method takes a nullable value type as an argument (e.g.,
FooAsync(int? value)) or has a nullable value type as its return type (e.g.,UnaryResult<int?>), passingnullmay cause anAccessViolationException.Fixes #1021