Event using event keyword and Event Handler

Program.cs

using System;

namespace create_implement_events_callbacks
{
    public class MyArgs : EventArgs
    {
        public MyArgs(string value)
        {
            Value = value;
        }
        public string Value { get; set; }
    }
    class Program
    {
        static void Main(string[] args)
        {
            var pub = new Publisher();

            pub.OnChange += (sender, e) => Console.WriteLine($"Event raised: {e.Value}");
            pub.OnChange += (sender, e) => Console.WriteLine($"Event raised: {e.Value}");

            pub.Raise();
            Console.ReadKey();
        }
    }

    public class Publisher
    {
        public event EventHandler<MyArgs> OnChange = delegate { };

        public void Raise()
        {
            OnChange(this, new MyArgs("FIIIRED!"));
        }
    }
}