向上滚动
var scrollup = new ScrollText("listcontent");
scrollup.LineHeight = 60;
scrollup.Amount = 4;
scrollup.Start();

也可以当成marquee
var marquee = new ScrollText("listmarquee");
marquee.LineHeight = 60;
marquee.Amount = 1;
marquee.Timeout = 30;
marquee.Delay = 30;
marquee.Start();

向下滚动
var scrolldown = new ScrollText("listcontent");
scrolldown.LineHeight = 60;
scrolldown.Amount = 4;
scrolldown.Direction = "down";
scrolldown.Start();