I am trying to send the values between the pages using :
NavigationService.Navigate(new Uri(\"/ABC.xaml?name=\" + Company + \"&city=\" + City , UriKind.R
You Could also pass parameters to you App.xaml.cs code where you can define global values that you can access throughout your app,
http://www.developer.nokia.com/Blogs/Community/2011/08/25/passing-data-between-pages-in-windows-phone-7/