Question

I am completely new in windows phone app development. I want to know what is the best way to handle the different screen size while developing apps in windows phone 7.

Answer 1

As said in the comment, WinPhone7 has only one resolution, but to be prepared for the new devices (WinPhone8) you should code something like this:

using System.Windows;  
public void GetScreenResolution(out int w, out int h)  
{  

     w = Application.Current.Host.Content.ActualWidth;  
     h = Application.Current.Host.Content.ActualHeight;  
}