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Compiler Error C3248

Error Message

'function1': function declared as '__sealed' cannot be overridden by 'function2'

A derived class tried to override a __sealed virtual method.

C3248 is only reachable using /clr:oldSyntax.

The following sample generates C3248:

// C3248b.cpp
// compile with: /clr:oldSyntax
using namespace System;

__gc struct B {
   __sealed virtual void func();

__gc struct D : B {
   void func();   // C3248

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