Compiler Error C3342
Visual Studio 2015
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The latest version of this topic can be found at Compiler Error C3342.
attribute': ambiguous attribute
The compiler found more than one definition of an attribute.
An attribute was defined more than once.
For more information, see User-Defined Attributes.
The following sample generates C3342.
// C3342.cpp
// compile with: /clr /c
using namespace System;
using namespace System::Reflection;
[AttributeUsage(AttributeTargets::All)]
public ref class XAttribute : public Attribute {};
[AttributeUsage(AttributeTargets::All)]
public ref class X : public Attribute {};
[X] // C3342 could refer to X or XAttribute
// try the following line instead
// [XAttribute]
public ref class Class4 {};
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