using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Udalost
{



    delegate void onChange(object handle, EventArgs arg);




    class Teplomer {


        public event onChange zmena;
        double teplota;

        public double Teplota {
            get { return teplota; }
            set { 
                if(value != teplota){ 
                    teplota = value; 
                    if (zmena != null) 
                        zmena(null, null); 
                } 
            }
        }
    }




    class Program
    {
        static void Main(string[] args)
        {
            Teplomer t = new Teplomer();
            t.zmena += delegate(object handler, EventArgs arg) { Console.WriteLine("zmenila se teplota"); };
            t.zmena += new onChange(Zmena);

            Console.WriteLine("merim");
            t.Teplota = 5;
            Console.WriteLine("merim");
            t.Teplota = 10;
            Console.WriteLine("merim");
            t.Teplota = 10;

            Console.ReadLine();
        }

        static void Zmena(object h, EventArgs a) {
            Console.WriteLine("opravdu se zmenila");
        }
    }
}