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using System; using System.DirectoryServices; public class MainClass {   static void Main(string[] args) {     try     {       DirectoryEntry oRoot = new DirectoryEntry("LDAP://RootDSE");       string searchOU = (string)oRoot.Properties["defaultnamingcontext"].Value;       DirectoryEntry de = new DirectoryEntry("LDAP://CN=Users," + searchOU);        Console.WriteLine(oRoot.Name);       oRoot.Close();                DirectorySearcher search = new DirectorySearcher(de);       search.Filter = "(CN=Administrator)";       search.PropertiesToLoad.Add("distinguishedName");       SearchResultCollection results = search.FindAll();              string strRet="Not Found";       foreach(SearchResult result in results)       {         DirectoryEntry data = result.GetDirectoryEntry();         strRet = (string)data.Properties["distinguishedName"].Value;         Console.WriteLine(strRet);         data.Close();       }       de.Close();       results.Dispose();     }catch(Exception e){       Console.WriteLine( e.Message);     }   } }