public bool ContainsUserName( 
   string userName
)

'Declaration
 
Public Function ContainsUserName( _
   ByVal userName As String _
) As Boolean

Parameters

userName

The fully qualified user name of the ApplicationUser of interest.

Return Value

Target Platforms: 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

Reference

ApplicationUserCollection Class
ApplicationUserCollection Members