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AttributeTargets Enumeration

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.

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)

[SerializableAttribute]
[FlagsAttribute]
[ComVisibleAttribute(true)]
public enum AttributeTargets

Member nameDescription
Supported by the .NET Compact FrameworkSupported by the XNA FrameworkAssemblyAttribute can be applied to an assembly.
Supported by the .NET Compact FrameworkSupported by the XNA FrameworkModuleAttribute can be applied to a module.
NoteNote:

Module refers to a portable executable file (.dll or.exe) and not a Visual Basic standard module.

Supported by the .NET Compact FrameworkSupported by the XNA FrameworkClassAttribute can be applied to a class.
Supported by the .NET Compact FrameworkSupported by the XNA FrameworkStructAttribute can be applied to a structure; that is, a value type.
Supported by the .NET Compact FrameworkSupported by the XNA FrameworkEnumAttribute can be applied to an enumeration.
Supported by the .NET Compact FrameworkSupported by the XNA FrameworkConstructorAttribute can be applied to a constructor.
Supported by the .NET Compact FrameworkSupported by the XNA FrameworkMethodAttribute can be applied to a method.
Supported by the .NET Compact FrameworkSupported by the XNA FrameworkPropertyAttribute can be applied to a property.
Supported by the .NET Compact FrameworkSupported by the XNA FrameworkFieldAttribute can be applied to a field.
Supported by the .NET Compact FrameworkSupported by the XNA FrameworkEventAttribute can be applied to an event.
Supported by the .NET Compact FrameworkSupported by the XNA FrameworkInterfaceAttribute can be applied to an interface.
Supported by the .NET Compact FrameworkSupported by the XNA FrameworkParameterAttribute can be applied to a parameter.
Supported by the .NET Compact FrameworkSupported by the XNA FrameworkDelegateAttribute can be applied to a delegate.
Supported by the .NET Compact FrameworkSupported by the XNA FrameworkReturnValueAttribute can be applied to a return value.
Supported by the .NET Compact FrameworkSupported by the XNA FrameworkGenericParameterAttribute can be applied to a generic parameter.
NoteNote:

Currently, this attribute can be applied only in C#, Microsoft intermediate language (MSIL), and emitted code.

Supported by the .NET Compact FrameworkSupported by the XNA FrameworkAllAttribute can be applied to any application element.

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.

The following example illustrates the application of attributes to various targets.

NoteNote:

Visual Basic and Visual C++ syntax currently do not support the application of attributes to type parameters.

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 a generic type parameter.
    [AttributeUsage(AttributeTargets.GenericParameter)]
    public class GenericParameterTargetAttribute : 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;

        public void GenericMethod<
            [GenericParameterTarget, AllTargets] T>(T x) {
        }

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

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

XNA Framework

Supported in: 3.0, 2.0, 1.0

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