RÉCUPÉRATION SID UTILISATEUR À PARTIR DE SON NOM

using System.Management; 

namespace glcSystem
{
public class glcSystemUtil
{

/// <summary>
/// Return the SID associated to a username
/// </summary>
/// <param name="_oUsername">SID of username to get.</param>
/// <returns>Return a string like S-1-5-21-1844237615-73586283-725345543-1003</returns>
public static string GetUserSID (string _oUsername) 
{ 
  ManagementObjectSearcher	query; 
  ManagementObjectCollection	queryCollection; 

  // local scope 
  ConnectionOptions co    = new ConnectionOptions(); 
  co.Username	    = _oUsername; 
  ManagementScope msc = new ManagementScope ("\\root\\cimv2",co); 
  string queryString	    = "SELECT * FROM Win32_UserAccount where name='" +co.Username  +"'"; 
  SelectQuery q    	    = new SelectQuery (queryString); 
  query 		    = new ManagementObjectSearcher(msc, q); 
  queryCollection	    = query.Get(); 
  string res	                    = String.Empty; 
			
  foreach(ManagementObject mo in queryCollection)
  { 
    // there should be only one here! 
    res+= mo["SID"].ToString(); 
  } 
  return res; 
} 

}
}