Gets and sets the property PathPrefix. 
            
            The path prefix for filtering the results. For example:                 CopyC#,
            which would get all user names whose path            starts with
CopyC#,
            which would get all user names whose path            starts with /division_abc/subdivision_xyz/
 CopyC#.
CopyC#.
            /division_abc/subdivision_xyz/
This parameter is optional. If it is not included, it defaults to a slash (/), listing all user names.
 Declaration Syntax
 Declaration Syntax| C# | 
public string PathPrefix { get; set; }