How to check to see if a user is in group or nested group

   1:              LdapManager myLDAP = new LdapManager("192.168.1.40");

   2:   

   3:              if (!myLDAP.Login("administrator", "Passw0rd2"))

   4:              {

   5:                  label1.Text = "Invalid Login";

   6:                  return;

   7:   

   8:              }

   9:   

  10:              LdapUser oUser = myLDAP.GetUser(UserProperty.Username, "linda");

  11:   

  12:              if (oUser.IsInGroup("groupA"))

  13:              {

  14:                  label1.Text = "User is in groupA";

  15:              }

  16:              else

  17:              {

  18:                  label1.Text = "NOT IN GROUP";

  19:              }