Lookup<TKey, TElement>.Contains Method
Microsoft Silverlight will reach end of support after October 2021. Learn more.
Determines whether a specified key is in the Lookup<TKey, TElement>.
Namespace: System.Linq
Assembly: System.Core (in System.Core.dll)
Syntax
'Declaration
Public Function Contains ( _
key As TKey _
) As Boolean
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
Examples
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.
Dim hasG As Boolean = lookup.Contains("G"c)
// Determine if there is a key with the value 'G' in the Lookup.
bool hasG = lookup.Contains('G');
Version Information
Silverlight
Supported in: 5, 4, 3
Silverlight for Windows Phone
Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0
XNA Framework
Supported in: Xbox 360, Windows Phone OS 7.0
Platforms
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.