On most screens within your Windows Phone 7 application you might need to display your application name. This might be in a simple page or one that contains a Pivot or Panorama.
With the XAML that gets generated you can enter your application name for the respective page types as:
Notice how the same text is entered for each title as a string literal?
A better solution is to use a string resource. To create a string resource, add the following to your Application.Resources node within the App.xaml file.
Then everywhere you need to use your application name you can use the following syntax