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TypeBuilder.IsDefined Method

Determines whether a custom attribute is applied to the current type.

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

public override bool IsDefined (
	Type attributeType,
	bool inherit
public boolean IsDefined (
	Type attributeType, 
	boolean inherit
public override function IsDefined (
	attributeType : Type, 
	inherit : boolean
) : boolean
Not applicable.



The type of attribute to search for. Only attributes that are assignable to this type are returned.


Specifies whether to search this member's inheritance chain to find the attributes.

Return Value

true if one or more instances of attributeType, or an attribute derived from attributeType, is defined on this type; otherwise, false.

Exception typeCondition


This method is not currently supported for incomplete types. Retrieve the type using GetType and call IsDefined on the returned Type.


attributeType is not defined.

This method is not supported for incomplete generic type parameters. Retrieve the type using Type.GetType or Assembly.GetType and use reflection on the retrieved type.

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0