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Compiler Error C3627

Only a value type can be boxed

Only value classes can be boxed.

The following sample generates C3627:

// C3627.cpp
// compile with: /clr:oldSyntax
#using <mscorlib.dll>

__value class vA {
};

__gc class A {
};

int main()
{
   A* a;
   __box(a);   // C3627

   // box a value type
   vA va;
   __box(va);
}

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