//https://stackoverflow.com/questions/4098059/can-you-fire-events-with-automatic-properties

​

using System;

​

public class Program

{

    public static void Main()

    {

        //You can get a stream from web service, and needs to have an instance of System.Drawing.Image

        // and getting metadata  

          Console.WriteLine("fire events with automatic properties");

          var user = new User();

         user.AgeChanged += (s,e) => Console.WriteLine("UserNamed changed to {0}",user.UserName);

         user.UserName="Jack";

    }

}

public class User

    {

        public event EventHandler AgeChanged;     

        private string _UserName;

        public string UserName

        {

            get

            {

                return _UserName;

            }

             set  

            {

                _UserName = value;

                 AgeChanged(this,EventArgs.Empty);

            }

        }

        protected virtual void OnAgeChanged(object sender ,EventArgs e)

        {

            if (AgeChanged != null)

            {

                AgeChanged(sender, e);

            }

        }

   }

​

​