compiler-error-c3168.md

title	Compiler Error C3168
description	Learn more about: Compiler Error C3168
ms.date	11/04/2016
f1_keywords	C3168
helpviewer_keywords	C3168

Compiler Error C3168

'type' : illegal underlying type for enum

Remarks

The underlying type you specified for the enum type was not valid. The underlying type must be an integral C++ type or a corresponding CLR type.

Example

The following example generates C3168:

// C3168.cpp
// compile with: /clr /c
ref class G{};

enum class E : G { e };   // C3168
enum class F { f };   // OK