ContainsKey Method

Returns a boolean value indicating whether an item with the specified key exists in this collection.

Syntax

Visual Basic

'Declaration
 
Public Function ContainsKey( _
   ByVal key As String _
) As Boolean

C#

public bool ContainsKey( 
   string key
)

Parameters

key

The case-insensitive key to test.

Return Value

True if an item with the specified key exists in the collection.

Requirements

Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, 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