If you are such an asp.net expert then you would not need to ask that kind of question, especially not here since this forum is specific to mojoPortal and there are better forums on the web for general asp.net questions. If you want to know more about url rewriting in asp.net you can google and find lots of information.
I get the sense you only made this post for link placement. If you make additional posts of this nature I will lock your account.
Also please note that making posts for link placement in these forums will not help your SEO since all links posted in the forums here automatically get rel="nofollow" appended to them.