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)

public bool Contains(
	TKey key
)

Parameters

key
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.

Implements

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.

// Determine if there is a key with the value 'G' in the Lookup. 
bool hasG = lookup.Contains('G');

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

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

.NET Framework

Supported in: 3.5

.NET Compact Framework

Supported in: 3.5

XNA Framework

Supported in: 3.0
Was this page helpful?
(1500 characters remaining)
Thank you for your feedback

Community Additions

ADD
Show:
© 2014 Microsoft