static void Main(string[] args)
{
var classWithMethodsMatchingEventTypes = new ClassWithMethodsMatchingEventTypes();
// 1. Demonstrate how do "add" and "remove" accessors of event property work.
var p = new Program();
p.MyEvent += new EventHandler(classWithMethodsMatchingEventTypes.DoNothing);
p.MyEvent -= null; // It does not matter that we are passing null, "remove" accessor code is executed.
// 2. Attach the handler to an event declared using "shorthand" notation.
var classWithTheShorthandEventProp = new ShorthandEventAndBackingDelegateDeclaration();
classWithTheShorthandEventProp.NewMessage += new EventHandler <NewMessageEventArgs>
(classWithMethodsMatchingEventTypes.LogEventToConsole);
NewMessageEventArgs eventArgs = new NewMessageEventArgs {
Message = "Hello! It's a brand new message"
};
// Raise the event.
classWithTheShorthandEventProp.OnNewMessage(eventArgs);
}
// The above is translated to the following in C# 1.1:
// private EventHandler<NewMessageEventArgs> _newMessage;
//
// public event EventHandler<NewMessageEventArgs> NewMessage
// {
// add
// {
// lock (this)
// {
// _newMessage += value;
// }
// }
// remove
// {
// lock (this)
// {
// _newMessage -= value;
// }
// }
// }
/// <summary>
/// Raises the NewMessage event.
/// </summary>
public virtual void OnNewMessage(NewMessageEventArgs e)
{
NewMessage?.Invoke(this, e);
}
public void LogEventToConsole(object sender, NewMessageEventArgs e)
{
Console.WriteLine(e.Message);
}