IList.Contains Method

Collection<T>.IList.Contains Method (Object)


Determines whether the IList contains a specific value.

Namespace:   System.Collections.ObjectModel
Assembly:  mscorlib (in mscorlib.dll)

bool IList.Contains(
	object value


Type: System.Object

The Object to locate in the IList.

Return Value

Type: System.Boolean

true if the Object is found in the IList; otherwise, false.

Exception Condition

value is of a type that is not assignable to the IList.

This method determines equality by first determining whether value is of type T (or null) and then calling Contains.

This method is an O(n) operation, where n is Count.

Universal Windows Platform
Available since 4.5
.NET Framework
Available since 2.0
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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