Compiler Error C3809

'class' : a managed or WinRT type cannot have any friend functions/classes/interfaces

Remarks

Managed types and Windows Runtime types do not allow friends. To fix this error, do not declare friends inside managed or Windows Runtime types.

Example

The following example generates C3809:

// C3809a.cpp
// compile with: /clr
ref class A {};

ref class B
{
public:
   friend ref class A;   // C3809
};

int main()
{
}