My idea was to bind the menu directly with dataset but unfortunately, dataset is not inherited and implemented IHierarchicalDataSource and it throws the exception. So, I tend to do traditional way of by adding menuItem in the loop. I know this is not a good idea and there must be someone who already implmented the neater way of binding directly by tweaking the dataset as the ASP.NET Menu has been released since 2 or 3 years ago.
Just a couple minutes spending on google and found this which is neater code and better design.
http://aspalliance.com/822
By using XMLDataSource and XSLT, this support unlimited hierarchical levels and only a few line of codes and clean.
Just have a look that above link if you are looking for building dynamic menu, it's worth to look it at.
Cheers
