ContainsKey Method

Determines whether the IDictionary contains an element with the specified key.

Syntax

Visual Basic

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

C#

public bool ContainsKey( 
   string key
)

Parameters

key

The key to locate in the IDictionary.

Return Value

true if the IDictionary contains an element with the key; otherwise, false.

Exceptions

Exception	Description
System.ArgumentNullException	key is null.

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