GetCustomAttribute(T) Method (ParameterInfo, Boolean)

CustomAttributeExtensions.GetCustomAttribute<T> Method (ParameterInfo, Boolean)

.NET Framework 4.6 and 4.5

Retrieves a custom attribute of a specified type that is applied to a specified parameter, and optionally inspects the ancestors of that parameter.

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

public static T GetCustomAttribute<T>(
	this ParameterInfo element,
	bool inherit
where T : Attribute


Type: System.Reflection.ParameterInfo

The parameter to inspect.

Type: System.Boolean

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

Return Value

Type: T

A custom attribute that matches T, or null if no such attribute is found.

Type Parameters


The type of attribute to search for.

Exception Condition

element is null.


element is not a constructor, method, property, event, type, or field.


More than one of the requested attributes was found.


A custom attribute type cannot be loaded.

Use the GetCustomAttributes extension method if you expect more than one value to be returned, or AmbiguousMatchException will be thrown.

Universal Windows Platform
Available since 4.5
.NET Framework
Available since 4.5
Portable Class Library
Supported in: portable .NET platforms
Windows Phone Silverlight
Available since 8.0
Windows Phone
Available since 8.1
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