Contains Method

Queue.Contains Method (Object)


Determines whether an element is in the Queue.

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

Public Overridable Function Contains (
	obj As Object
) As Boolean


Type: System.Object

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

Return Value

Type: System.Boolean

true if obj is found in the Queue; otherwise, false.

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 obj 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 obj parameter on the objects in the collection.

Universal Windows Platform
Available since 10
.NET Framework
Available since 1.1
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