compiler-error-c3100.md

title	Compiler Error C3100
description	Learn more about: Compiler Error C3100
ms.date	11/04/2016
f1_keywords	C3100
helpviewer_keywords	C3100

Compiler Error C3100

'target' : unknown attribute qualifier

Remarks

An invalid attribute target was specified.

For more information, see User-Defined Attributes.

Example

The following example generates C3100.

// C3100.cpp
// compile with: /clr /c
using namespace System;
[AttributeUsage(AttributeTargets::All)]
public ref class Attr : public Attribute {
public:
   Attr(int t) : m_t(t) {}
   int m_t;
};

[invalid_target:Attr(10)];   // C3100
[assembly:Attr(10)];   // OK