it is better to find a proper mentor which is professional in the asp.net domain.
you should be professional to the asp.net web work mechanism. for example, if you know the page ojbect and page lifetime, httpruntime,httprequest, httpresponse, httpmodule,httpcontext,httphandler, and server,session,application,cache,cookie,viewstate, you may be professional in asp.net domain to some extend.
of course you should know the low-level implementation about clr for senior user.