public void DeleteTimerById(int id)
        {
            var timer = MessageTimers.First(t => t.Id == id);

            if (timer != null)
            {
                MessageTimers.Remove(timer);
                AssistantDb.Instance.Timers.Delete(timer.Id);
                AssistantDb.Instance.SaveChanges();
            }
        }
        private void AddTimer()
        {
            MessageTimer newTimer = new MessageTimer()
            {
                Message   = "Enter you message and enble timer(Togle button ->)!",
                IsEnabled = false,
                Interval  = new TimeSpan(0, 0, 10).Ticks,
                LastShow  = DateTime.Now
            };

            MessageTimers.Add(newTimer);
            AssistantDb.Instance.Timers.Add(newTimer);
            SaveChange();
        }