Attribute.IsDefined Method (MemberInfo, Type)
Microsoft Silverlight will reach end of support after October 2021. Learn more.
Determines whether any custom attributes are applied to a member of a type. Parameters specify the member, and the type of the custom attribute to search for.
Namespace: System
Assembly: mscorlib (in mscorlib.dll)
Syntax
'Declaration
Public Shared Function IsDefined ( _
element As MemberInfo, _
attributeType As Type _
) As Boolean
public static bool IsDefined(
MemberInfo element,
Type attributeType
)
Parameters
- element
Type: System.Reflection.MemberInfo
An object derived from the MemberInfo class that describes a constructor, event, field, method, type, or property member of a class.
- attributeType
Type: System.Type
The type, or a base type, of the custom attribute to search for.
Return Value
Type: System.Boolean
true if a custom attribute of type attributeType is applied to element; otherwise, false.
Exceptions
| Exception | Condition |
|---|---|
| ArgumentNullException | element or attributeType is nulla null reference (Nothing in Visual Basic). |
| ArgumentException | attributeType is not derived from Attribute. |
| NotSupportedException | element is not a constructor, method, property, event, type, or field. |
Remarks
The ancestors of element are searched for custom attributes.
Version Information
Silverlight
Supported in: 5, 4, 3
Silverlight for Windows Phone
Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0
XNA Framework
Supported in: Xbox 360, Windows Phone OS 7.0
Platforms
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.