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Lookup(TKey, TElement).Contains Method

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.


ILookup(TKey, TElement).Contains(TKey)

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.

.NET Framework

Supported in: 4, 3.5

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.