public bool Insert_Position(position a)
 {
     try
     {
         DALPosition.Insert_Position(a);
         DALPosition.SubmitChanges();
         return true;
     }
     catch (Exception e)
     {
         error = e.Message;
         return false;
     }
 }
 public static void Insert_Position(position a)
 {
     db.position.InsertOnSubmit(a);
 }
 partial void Deleteposition(position instance);
 partial void Updateposition(position instance);
 partial void Insertposition(position instance);