C# Events

using Events; var alarm = new Alarm(1000); alarm.OnAlarmRing += HandleOnAlarmEvent; await alarm.Start(); void HandleOnAlarmEvent(object sender, AlarmEventArgs e) { System.Console.WriteLine("Alarm Finished"); System.Console.WriteLine($"Message : {e.Message}"); } 

namespace Events { public class AlarmEventArgs : EventArgs { public AlarmEventArgs(string message) { Message = message; } public string Message { get; set; } } // Biz EventArgs Ni o'zimiz majburlab boshqa type oladigan qildik xo'sh  // endi EventHandler ni Generik qilishimiz kerak public class Alarm { // Event elon qilish // public delegate void AlarmRingEvent(); // public event AlarmRingEvent OnAlarmRing; public event EventHandler<AlarmEventArgs> OnAlarmRing; // ---------------------------------------------- public int Time { get; set;} public Alarm(int time) { Time = time; } public async Task Start() { var now = DateTime.Now; await Task.Delay(Time); // OnAlarmRing?.Invoke(); OnAlarmRing?.Invoke(this, new AlarmEventArgs($"Time is up : {DateTime.Now}")); } } } /* EventArgs - Event bilan jo'natilishi kerak bo'lgan ma'lumotlarni Encapsulate qilib jo'natadi EventArgs - ichida hech narsa yo'q Faqat Inheritance uchun ishlatiladi object sender - Publish qilayotgan objectni o'zi */ 

Alarm Finished Message : Time is up : 5/12/2022 5:58:00 PM