private void ReadAllPomodoros() { this.allRegisteredPomodoros.Clear(); var todaysPomodoros = this.databaseConnection.ExecuteReader("select * from PomodoroRegistrations"); foreach (DataRow r in todaysPomodoros.Rows) { var p = new PomodoroRegistration() { Start = Convert.ToDateTime(r["TimeStamp"]), Duration = TimeSpan.FromTicks(Convert.ToInt64(r["Duration"])), Rating = Convert.ToInt32(r["Evaluation"]), }; this.allRegisteredPomodoros.Add(p); } }