Guys I have client who's website is dynamic but site is huge more than 50 pages are .. but he is not able to come up very well in Google and MSN. The problem is he is using User control for every page and updating the link and if session is not create it will redirect page to Index. I told him to fix it but he wants user control be used as it will help in coding and adding multiple pages. If we create session every time it will connect to Database which will lead to lower performance of website.

SO now tell me how can we make it look like static and crawled by Google so as too make its visible and come up in SE's ...

You can't.

If it relies on sessions, it's dead as far as SE traffic goes.

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Unfortunately, although the search engines are now more powerful than the past in finding and indexing the dynamically created web pages, but still they have problems in ranking and the dynamic websites. Te reason is quite clear, Google for example, likes seeing stable status of the links and sites on the web and so temporarily and instantly built pages are not really ideal.