• Article

Attribute.IsDefined Method (ParameterInfo, Type)

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Determines whether any custom attributes are applied to a method parameter. Parameters specify the method parameter, 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 ParameterInfo, _
    attributeType As Type _
) As Boolean

public static bool IsDefined(
    ParameterInfo element,
    Type attributeType
)

Parameters

  • 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.

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.