Post/Email-3: Events in .NET

Today, a friend of mine asked a question on facebook:

Any body knows why wouldn't the selectionChanged event be fired?
I'm trying to change the text of a textBlock once I scroll to the next item in a pivot page

When I came into the scene, so to speak, another person had supplied the fix for the issue like so:

hmm in xaml u have to call your function SelectionChanged="thisPivot_SelectionChanged" and your textblock gets changed...

<controls:Pivot
 Title="MY APPLICATION"
 SelectionChanged="thisPivot_SelectionChanged"
 Name="pivot">

Then I started talking to my friend, and here’s how our conversation went: