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MemberInfo.IsDefined Method

When overridden in a derived class, indicates whether one or more attributes of the specified type or of its derived types is applied to this member.

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

abstract IsDefined : 
        attributeType:Type * 
        inherit:bool -> bool 

Parameters

attributeType
Type: System.Type
The type of custom attribute to search for. The search includes derived types.
inherit
Type: System.Boolean
true to search this member's inheritance chain to find the attributes; otherwise, false. This parameter is ignored for properties and events; see Remarks.

Return Value

Type: System.Boolean
true if one or more instances of attributeType or any of its derived types is applied to this member; otherwise, false.

Implements

ICustomAttributeProvider.IsDefined(Type, Boolean)
_MemberInfo.IsDefined(Type, Boolean)

This method ignores the inherit parameter for properties and events. To search the inheritance chain for attributes on properties and events, use the appropriate overloads of the Attribute.IsDefined method.

NoteNote

In the .NET Framework version 2.0, this method returns true if a type, method, or constructor has security attributes stored in the new metadata format. Assemblies compiled with version 2.0 use this format. Dynamic assemblies and assemblies compiled with earlier versions of the .NET Framework use the old XML format. See Emitting Declarative Security Attributes.

The following example determines whether the specified attribute is applied to the specified member.

No code example is currently available or this language may not be supported.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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