even i'm not an expert in animation. but i think u should develop the animation in flash and then incorporate it to the .net application.

to do that u can use the following coding

<object classid="clsid27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/s...rsion=6,0,29,0" style="height: 200px" width="890">
<param name="movie" value="034.swf">
<param name="quality" value="high">
<embed src="034.swf" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="890" height="200"></embed>
</object>

either flash or an animated gif if it is nice and simple. an animated gif is a series of "still" gifs put together one after the other and played fast (just as a normal movie is created). No extra tools are needed by the end user then - just a normal img tag will display it.