Raising an event
<p>I have a form with two RichTextBoxs on them, I want to raise an event in one to trigger an event on the form which updates something in the other rtb. </p>

<p>Where must I define the EventArgs extended class? 
What is and where must my delegate be? Is this the function that is called from the event being raised?
Do these three classes (rtb1, rtb2, form1) need to be in the same namespace?</p>
