What are these numbers on the right side of my Windows Phone Silverlight app?

Question

I've got a Windows Phone Silverlight app, and there are some numbers to the right when I run the emulator:

What do they mean, and how can I hide them?

Answer 1

That's the frame rate counter for the emulator / phone that is on by default whenever you debug. To turn it off, go to App.xaml.cs and comment this line out:

Application.Current.Host.Settings.EnableFrameRateCounter = true; 

For more information on what the numbers mean (they can be pretty helpful for tracking app performance), see Jeff Wilcox's post on this.