How can I get a screen resolution of Device (Windows Phone)

Question

How can I get a screen resolution of Device from settings (Windows Phone) ?

Answer 1

This may be a better way to know what screen resolution is your app running on.

if(App.Current.Host.Content.ScaleFactor == 100)
{
  // WVGA
}
else if (App.Current.Host.Content.ScaleFactor == 160)
{
  // WXGA
}
else if (App.Current.Host.Content.ScaleFactor == 150)
{
  // 720p
}

Source http://msdn.microsoft.com/en-us/library/windowsphone/develop/jj206974%28v=vs.105%29.aspx