Lookup<'TKey, 'TElement>.Contains Method ('TKey)


Determines whether a specified key is in the Lookup<'TKey, 'TElement>.

Namespace:   System.Linq
Assembly:  System.Core (in System.Core.dll)

abstract Contains : 
        key:'TKey -> bool
override Contains : 
        key:'TKey -> bool


Type: TKey

The key to find in the Lookup<'TKey, 'TElement>.

Return Value

Type: System.Boolean

true if key is in the Lookup<'TKey, 'TElement>; otherwise, false.

The following example demonstrates how to use Contains to determine whether a Lookup<'TKey, 'TElement> contains a specified key. This code example is part of a larger example provided for the Lookup<'TKey, 'TElement> class.

No code example is currently available or this language may not be supported.

Universal Windows Platform
Available since 8
.NET Framework
Available since 3.5
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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