Windows Phone 7 : How to change Startup Page

Windows Phone 7 Silverlight project generally starts by opening MainPage.xaml. How to change this?

Under solution explorer, expand Properties and open WMAppManifest.xml and there we can change it

<Tasks>
  <DefaultTask Name="_default" NavigationPage="LocalDB_WP7.xaml" />
</Tasks>

Namoskar!!!!