title: How to add event handler in c#?
body: <p>I'm totally new to Events and delegates in C#.
  I want to handle a data read event in one class (ex. program) and port reading is done in another class(ex. transfer).
  I know how to do it with delegates alone,but don't know how to do it in events.</p>
  
  <p>Could you give me a simple sample. Thanks.</p>