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Compiler Error C3652

'override' : a function that explicitly overrides must be virtual

A function that does an explicit override must be virtual. For more information, see Explicit Overrides.

The following sample generates C3652:

// C3652.cpp
// compile with: /clr /c
public interface class I {
   void f();

public ref struct R : I {
   void f() = I::f {}   // C3652
   // try the following line instead
   // virtual void f() = I::f {}