How to get telephone number from active directory

See more:

C#

public void check()
       {
           // Connect to LDAP
           AuthenticationTypes authTypes; // Authentication flags.
           authTypes = AuthenticationTypes.Signing | AuthenticationTypes.Sealing | AuthenticationTypes.Secure;
           string domainAndUsername = "xglobal" + @"\" + TextBox1.Text;
           DirectoryEntry oAuthedEntry = new DirectoryEntry();
           // Create new DirectorySearcher instance
           DirectorySearcher search = new DirectorySearcher(oAuthedEntry);
           // Set search criteria
           search.Filter = "(objectCategory=user)";
           //search.PropertiesToLoad.Add("displayName");                             // name
           //search.PropertiesToLoad.Add("physicalDeliveryOfficeName");      // location
           search.PropertiesToLoad.Add("telephoneNumber");                    // phone number
           search.PropertiesToLoad.Add("mobile");                                     // mobile
           //search.PropertiesToLoad.Add("mail");                                        // email address
           //search.PropertiesToLoad.Add("msDS-UserAccountDisabled");   // account status
           //search.PropertiesToLoad.Add("title");                                        // title
           //search.PropertiesToLoad.Add("ms-DS-UserAccountAutoLocked");     // locked
           search.Filter = String.Format("(SAMAccountName={0})", TextBox1.Text);
           // Perform the search
           SearchResultCollection results = null;
           try
           {
               results = search.FindAll();
               Response.Write(results .ToString());

I Am Stuck Here
:confused:

}
          catch (Exception searchEx)
          {
              throw new Exception("Error obtaining users results. ", searchEx);
          }

      }

If i retrive the count of the results collection , it says 1;
but i am not sure if its the result or not.