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Compiler Error CS0653

Visual Studio 2008

Cannot apply attribute class 'class' because it is abstract

An abstract custom attribute class cannot be used as an attribute.

The following sample generates CS0653:

// CS0653.cs
using System;

public abstract class MyAttribute : Attribute
{
}

public class My2Attribute : MyAttribute
{
}

[My]   // CS0653
// try the following line instead
// [My2]
class MyClass
{
   public static void Main()
   {
   }
}
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