StringCollection.IList.Contains Method

Determines whether an element is in the StringCollection.

Namespace:  System.Collections.Specialized
Assembly:  System (in System.dll)

bool IList.Contains(
	Object value
)

Parameters

value
Type: System.Object

The Object to locate in the StringCollection. The value can be null.

Return Value

Type: System.Boolean
true if value is found in the StringCollection; otherwise, false.

Implements

IList.Contains(Object)

This method determines equality by calling Object.Equals.

This method performs a linear search; therefore, this method is an O(n) operation, where n is Count.

Starting with the .NET Framework 2.0, this method uses the collection’s objects’ Equals and CompareTo methods on item to determine whether item exists. In the earlier versions of the .NET Framework, this determination was made by using the Equals and CompareTo methods of the item parameter on the objects in the collection.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
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