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

This enumeration has a FlagsAttribute attribute that allows a bitwise combination of its member values.

[Visual Basic]
<Flags>
<Serializable>
Public Enum AttributeTargets
[C#]
[Flags]
[Serializable]
public enum AttributeTargets
[C++]
[Flags]
[Serializable]
__value public enum AttributeTargets
[JScript]
public
   Flags
   Serializable
enum AttributeTargets

Remarks

AttributeTargets is used as a parameter of AttributeUsageAttribute 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

Example

The following code sample illustrates the application of the AttributeTargets enumeration:

[C#] 
using System;

namespace AttTargsCS {
    // This attribute is only valid on a class.
    [AttributeUsage(AttributeTargets.Class)]
    public class ClassTargetAttribute : Attribute {
    }

    // This attribute is only valid on a method.
    [AttributeUsage(AttributeTargets.Method)]
    public class MethodTargetAttribute : Attribute {
    }

    // This attribute is only valid on a constructor.
    [AttributeUsage(AttributeTargets.Constructor)]
    public class ConstructorTargetAttribute : Attribute {
    }

    // This attribute is only valid on a field.
    [AttributeUsage(AttributeTargets.Field)]
    public class FieldTargetAttribute : Attribute {
    }

    // This attribute is valid on a class or a method.
    [AttributeUsage(AttributeTargets.Class|AttributeTargets.Method)]
    public class ClassMethodTargetAttribute : Attribute {
    }

    // This attribute is valid on any target.
    [AttributeUsage(AttributeTargets.All)]
    public class AllTargetsAttribute : Attribute {
    }

    [ClassTarget]
    [ClassMethodTarget]
    [AllTargets]
    public class TestClassAttribute {
        [ConstructorTarget]
        [AllTargets]
        TestClassAttribute() {
        }

        [MethodTarget]
        [ClassMethodTarget]
        [AllTargets]
        public void Method1() {
        }

        [FieldTarget]
        [AllTargets]
        public int myInt;

        static void Main(string[] args) {
        }
    }
}

[JScript] 
import System;

package AttTargsJS {
    // This attribute is only valid on a class.
    AttributeUsage(AttributeTargets.Class)
    public class ClassTargetAttribute extends Attribute {
    }

    // This attribute is only valid on a method.
    AttributeUsage(AttributeTargets.Method)
    public class MethodTargetAttribute extends Attribute {
    }

    // This attribute is only valid on a constructor.
    AttributeUsage(AttributeTargets.Constructor)
    public class ConstructorTargetAttribute extends Attribute {
    }

    // This attribute is only valid on a field.
    AttributeUsage(AttributeTargets.Field)
    public class FieldTargetAttribute extends Attribute {
    }

    // This attribute is valid on a class or a method.
    AttributeUsage(AttributeTargets.Class|AttributeTargets.Method)
    public class ClassMethodTargetAttribute extends Attribute {
    }

    // This attribute is valid on any target.
    AttributeUsage(AttributeTargets.All)
    public class AllTargetsAttribute extends Attribute {
    }

    ClassTargetAttribute
        ClassMethodTargetAttribute
        AllTargetsAttribute
    public class TestClassAttribute {
        ConstructorTargetAttribute
        AllTargetsAttribute
        function TestClassAttribute() {
        }

        MethodTargetAttribute
                ClassMethodTargetAttribute
                AllTargetsAttribute
        public function Method1() {
        }

        FieldTargetAttribute
                AllTargetsAttribute
        public var myInt : int;

        static function Main(args : String[]) {
        }
    }
}

[Visual Basic, C++] No example is available for Visual Basic or C++. To view a C# or JScript example, click the Language Filter button in the upper-left corner of the page.

Requirements

Namespace: System

Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family, .NET Compact Framework - Windows CE .NET

Assembly: Mscorlib (in Mscorlib.dll)

See Also

System Namespace | AttributeUsageAttribute