using Microsoft.Phone.Shell;
ShellToast toast = new ShellToast();
toast.Title = "程序标题";
toast.Content = "内容";
toast.NavigationUri = new Uri("/xxx.xaml", UriKind.Relative);
toast.Show();
WP 前台或后台显示ShellToast,布布扣,bubuko.com
原文：http://www.cnblogs.com/fatdaniel/p/3709699.html