Exists Method

Returns true if an object with this key is already in the collection. Note, if key is null or a zero length string this method returns false

Syntax

Visual Basic

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

C#

public virtual bool Exists( 
   string key
)

Parameters

key

Key of item to test for.

Return Value

True if item exists, false otherwise.

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