AttributeTargets Enumeration

Specifies the application elements on which it is valid to apply an attribute.

Syntax

[System.Flags]
[System.Runtime.InteropServices.ComVisible(true)]
public enum AttributeTargets

Remarks

The AttributeUsageAttribute class uses this enumeration to specify the kind of element on which it is valid to apply an attribute.

AttributeTargets enumeration values can be combined with a bitwise OR operation to get the preferred combination.

Members

Member Name	Description
All	Attribute can be applied to any application element.
Assembly	Attribute can be applied to an assembly.
Class	Attribute can be applied to a class.
Constructor	Attribute can be applied to a constructor.
Delegate	Attribute can be applied to a delegate.
Enum	Attribute can be applied to an enumeration.
Event	Attribute can be applied to an event.
Field	Attribute can be applied to a field.
GenericParameter	Attribute can be applied to a generic parameter.
Interface	Attribute can be applied to an interface.
Method	Attribute can be applied to a method.
Module	Attribute can be applied to a module.
Parameter	Attribute can be applied to a parameter.
Property	Attribute can be applied to a property.
ReturnValue	Attribute can be applied to a return value.
Struct	Attribute can be applied to a structure; that is, a value type.

Example

The following example demonstrates how AttributeTargets can be used with AttributeUsageAttribute so that a user-defined attribute class, Author, can be applied to structures and classes. The Author attribute is then applied to a class. There is no output.

C# Example

using System;

[AttributeUsageAttribute(AttributeTargets.Class|
                         AttributeTargets.Struct)]
public class Author : Attribute {

   public Author(string Name) {
 
     this.name = Name; }
     string name;
   }

[Author("John Q Public")]
class JohnsClass {

   public static void Main() {
   }
}

Requirements

Namespace: System
Assembly: mscorlib (in mscorlib.dll)
Assembly Versions: 1.0.5000.0, 2.0.0.0, 4.0.0.0