silverlight browse information

  public class Browser
    {        /// <summary>           /// During static instantiation, only the Netscape flag is checked      
        /// /// </summary>      
        /// 
        static Browser()
        {
            _isNavigator = HtmlPage.BrowserInformation.Name.Contains("Netscape");
        }
        /// <summary>           /// Flag indicating Navigator/Firefox/Safari or Internet Explorer           /// </summary>   
        private static bool _isNavigator;
        /// <summary>           /// Provides quick access to the window.screen ScriptObject           /// </summary>         
        /// 
        private static ScriptObject Screen
        {
            get
            {
                ScriptObject screen = (ScriptObject)HtmlPage.Window.GetProperty("screen");
                if (screen == null)
                {
                    throw new InvalidOperationException();
                } return screen;
            }
        }
        /// <summary>           /// Gets the window object's client width           /// </summary>      
        public static double ClientWidth
        {
            get
            {
                return _isNavigator ? (double)HtmlPage.Window.GetProperty("innerWidth")
                    : (double)HtmlPage.Document.Body.GetProperty("clientWidth");
            }
        }
        /// <summary>           /// Gets the window object's client height           /// </summary>    
        public static double ClientHeight
        {
            get
            {
                return _isNavigator ? (double)HtmlPage.Window.GetProperty("innerHeight")
                    : (double)HtmlPage.Document.Body.GetProperty("clientHeight");
            }
        }
        /// <summary>           /// Gets the current horizontal scrolling offset           /// </summary>         
        /// 
        /// 
        public static double ScrollLeft
        {
            get
            {
                return _isNavigator ? (double)HtmlPage.Window.GetProperty("pageXOffset")
                    : (double)HtmlPage.Document.Body.GetProperty("scrollLeft");
            }
        }
        /// <summary>      
        /// Gets the current vertical scrolling offset           /// </summary>    
        /// 
        public static double ScrollTop
        {
            get
            {
                return _isNavigator ? (double)HtmlPage.Window.GetProperty("pageYOffset")
                    : (double)HtmlPage.Document.Body.GetProperty("scrollHeight");
            }
        }
        /// <summary>           /// Gets the width of the entire display           /// </summary>         
        public static double ScreenWidth
        {
            get
            {
                return (double)Screen.GetProperty("width");
            }
        }
        /// <summary>           /// Gets the height of the entire display           /// </summary>       
        public static double ScreenHeight
        {
            get
            {
                return (double)Screen.GetProperty("height");
            }
        }
        /// <summary>           /// Gets the width of the available screen real estate, excluding the dock           /// or task bar           /// </summary>   
        /// 
        /// 
        public static double AvailableScreenWidth
        {
            get
            {
                return (double)Screen.GetProperty("availWidth");
            }
        }
        /// <summary>           /// Gets the height of the available screen real estate, excluding the dock           /// or task bar           /// </summary>     
        /// 
        /// 
        public static double AvailableScreenHeight
        {
            get
            {
                return (double)Screen.GetProperty("availHeight");
            }
        }
        /// <summary>           /// Gets the absolute left pixel position of the window in display coordinates           /// </summary>       
        public static double ScreenPositionLeft
        {
            get
            {
                return _isNavigator ? (double)HtmlPage.Window.GetProperty("screenX")
                    : (double)HtmlPage.Window.GetProperty("screenLeft");
            }
        }         /// <summary>           /// Gets the absolute top pixel position of the window in display coordinates           /// </summary>     
        public static double ScreenPositionTop
        {
            get
            {
                return _isNavigator ? (double)HtmlPage.Window.GetProperty("screenY")
                    : (double)HtmlPage.Window.GetProperty("screenTop");
            }
        }
    }