How to create an event in C#?

public class MyEventClass
{
    public event EventHandler<MyEventArgs> MyEvent;

    public void RaiseEvent()
    {
        if (MyEvent != null)
        {
            MyEvent(this, new MyEventArgs("hello"));
        }
    }
}

public class MyEventArgs : EventArgs
{
    public MyEventArgs(string message)
    {
        this.Message = message;
    }

    public string Message { get; }
}

MyEventClass myObject = new MyEventClass();
myObject.MyEvent += MyEventHandler;
myObject.RaiseEvent();

public void MyEventHandler(object sender, MyEventArgs e)
{
    Console.WriteLine(e.Message);
}