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

c#, silverlight, silverlight-3.0, silverlight-4.0, windows-phone-7

Solution

public void GetScreenResolution()  
{  
     string ScreenWidth = Application.Current.Host.Content.ActualWidth.ToString();  
     string ScreenHeight = Application.Current.Host.Content.ActualHeight.ToString();  
     MessageBox.Show(ScreenWidth + "*" + ScreenHeight);  
}

Problem

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

Original source