CustomAttributeExtensions::IsDefined Method (ParameterInfo, Type)

.NET Framework 4.6 and 4.5

Indicates whether custom attributes of a specified type are applied to a specified parameter.

Namespace:  System.Reflection
Assemblies:   System.Reflection.Extensions (in System.Reflection.Extensions.dll)
  mscorlib (in mscorlib.dll)

static bool IsDefined(
	ParameterInfo^ element, 
	Type^ attributeType


Type: System.Reflection::ParameterInfo

The parameter to inspect.

Type: System::Type

The type of attribute to search for.

Return Value

Type: System::Boolean
true if an attribute of the specified type is applied to element; otherwise, false.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type ParameterInfo. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).


element or attributeType is nullptr.


attributeType is not derived from Attribute.

.NET Framework

Supported in: 4.6, 4.5

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8
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