you can write a custom tile server and link that into the new layer mechanisms with the standard MapControl:
var tileSourceSpec = new VETileSourceSpecification();
tileSourceSpec.ID = “SeattleTransit”
tileSourceSpec.TileSource = http://jbhatia1.members.winisp.net/SeattleTransit/%4.png;
tileSourceSpec.NumServers = 1;
tileSourceSpec.MinZoom = 2;
tileSourceSpec.MaxZoom = 16; See that .TileSource? Change the .png to a .aspx, and—presto!—dynamic tiles. That’s a lot easier than the javascript hacks in the article.