ToastPushNotificationMessage
"<?xml version=\"1.0\" encoding=\"utf-8\"?>" +
"<wp:Notification xmlns:wp=\"WPNotification\">" +
"<wp:Toast>" +
"<wp:Text1>{0}</wp:Text1>" +
"<wp:Text2>{1}</wp:Text2>" +
"</wp:Toast>" +
"</wp:Notification>"
TilePushNotificationMessage
"<?xml version=\"1.0\" encoding=\"utf-8\"?>" +
"<wp:Notification xmlns:wp=\"WPNotification\">" +
"<wp:Tile>" +
"<wp:BackgroundImage>{0}</wp:BackgroundImage>" +
"<wp:Count>{1}</wp:Count>" +
"<wp:Title>{2}</wp:Title>" +
"</wp:Tile>" +
"</wp:Notification>"