Fix #886: use default instead of null for optional struct ByRef parameters#1253
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…uct ByRef parameters When a VB optional ByRef parameter has a struct type with `Nothing` as default, Roslyn returns null from ExplicitDefaultValue. Generating a null literal causes a C# compile error since structs cannot be null. Use `default` instead when the parameter type is a value type and the default value is null. https://claude.ai/code/session_01AkwUvu3XuCdj3D4axoX4UX
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Fixes #886
When a VB optional ByRef parameter has a struct type with
Nothingas default, Roslyn returns null from ExplicitDefaultValue. Generating a null literal causes a C# compile error since structs cannot be null. Usedefaultinstead when the parameter type is a value type and the default value is null.https://claude.ai/code/session_01AkwUvu3XuCdj3D4axoX4UX