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CustomAttributeExtensions.IsDefined Method (ParameterInfo, Type, Boolean)

.NET Framework 4.6 and 4.5

Indicates whether custom attributes of a specified type are applied to a specified parameter, and, optionally, applied to its ancestors.

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

public static bool IsDefined(
	this ParameterInfo element,
	Type attributeType,
	bool inherit
)

Parameters

element
Type: System.Reflection.ParameterInfo

The parameter to inspect.

attributeType
Type: System.Type

The type of attribute to search for.

inherit
Type: System.Boolean

true to inspect the ancestors of element; otherwise, false.

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).

ExceptionCondition
ArgumentNullException

element or attributeType is null.

ArgumentException

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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