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If you want to pass a parameter to the click event handler you need to make use of the arrow function or bind the function. If you pass the argument directly the onClick function would be called automatically even before pressing the button.
Of course you can. (If it was the event you define yourself, you would need to create you own event arguments class where you would put all the information you need.
The EventHandler delegate is a predefined delegate that specifically represents an event handler method for an event that does not generate data. If your event does generate data, you must use the generic EventHandler<TEventArgs> delegate class.
In programming, an event handler is a callback routine that operates asynchronously once an event takes place. It dictates the action that follows the event. The programmer writes a code for this action to take place. An event is an action that takes place when a user interacts with a program.
Timer.Elapsed expects method of specific signature (with arguments object and EventArgs). If you want to use your PlayMusicEvent method with additional argument evaluated during event registration, you can use lambda expression as an adapter:
myTimer.Elapsed += new ElapsedEventHandler((sender, e) => PlayMusicEvent(sender, e, musicNote));
Edit: you can also use shorter version:
myTimer.Elapsed += (sender, e) => PlayMusicEvent(sender, e, musicNote);
If I understand your problem correctly, you are calling a method instead of passing it as a parameter. Try the following:
myTimer.Elapsed += PlayMusicEvent;
where
public void PlayMusicEvent(object sender, ElapsedEventArgs e)
{
music.player.Stop();
System.Timers.Timer myTimer = (System.Timers.Timer)sender;
myTimer.Stop();
}
But you need to think about where to store your note.
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