IList.Contains Method

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


Determines whether the IList contains a specific value.

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

bool IList.Contains(
	object item


Type: System.Object

The Object to locate in the IList.

Return Value

Type: System.Boolean

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

This method determines equality using the default equality comparer EqualityComparer<T>.Default for T, the type of values in the list.

This method performs a linear search; therefore, 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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