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Compiler Warning (level 1) C4377
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Compiler Warning (level 1) C4377

Error Message

native types are private by default; -d1PrivateNativeTypes is deprecated

In previous releases, native types in assemblies were public by default, and an internal, undocumented compiler option (/d1PrivateNativeTypes) was used to make them private.

All types, native and CLR, are now private by default in an assembly, so /d1PrivateNativeTypes is no longer needed.

Example

The following sample generates C4377.

// C4377.cpp
// compile with: /clr /d1PrivateNativeTypes /W1
// C4377 warning expected
int main() {}

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