compiler-error-c3156.md

description	title	ms.date	f1_keywords	helpviewer_keywords	ms.assetid
Learn more about: Compiler Error C3156	Compiler Error C3156	11/04/2016	C3156	C3156	1876da78-b94e-4af7-9795-28f72b209b3e

Compiler Error C3156

'class' : you cannot have a local definition of a managed or WinRT type

A function cannot contain the definition, or declaration, of a managed or WinRT class, struct, or interface.

Example

The following sample generates C3156.

// C3156.cpp
// compile with: /clr /c
void f() {
   ref class X {};   // C3156
   ref class Y;   // C3156
}