how to heck if the record exist in xamarin : Data Helper
 public bool insertIntoTablePerson(Person person)
        {
            try
            {
                using (var connection = new SQLiteConnection(System.IO.Path.Combine(folder, "Persons.db")))
                  
                {
              
                    connection.Insert(person);
                    return true;
                }
            }
            catch (SQLiteException ex)
            {
                Log.Info("SQLiteEx", ex.Message);
                return false;
            }
        }
