SortedDictionary(Of TKey, TValue).KeyCollection.ICollection(Of TKey).Contains Method (TKey)

 

Determines whether the ICollection(Of T) contains the specified value.

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

Private Function Contains (
	item As TKey
) As Boolean
	Implements ICollection(Of TKey).Contains

Parameters

item
Type: TKey

The object to locate in the ICollection(Of T).

Return Value

Type: System.Boolean

true if item is found in the ICollection(Of T); otherwise, false.

Implementations can vary in how they determine equality of objects; for example, List(Of T) uses Default, whereas SortedDictionary(Of TKey, TValue) allows the user to specify the IComparer(Of T) implementation to use for comparing keys.

This method is an O(1) operation.

Universal Windows Platform
Available since 8
.NET Framework
Available since 2.0
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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