Windows Phone 打开URL网页地址

  Microsoft.Phone.Tasks.WebBrowserTask task = new Microsoft.Phone.Tasks.WebBrowserTask();
       task.Uri = new Uri("http://www.windowsphone.com/s?appid=bb62cb87-2015-4c0c-adf7-fe79c74ad3ac", UriKind.Absolute);
       task.Show();