stop page refresh in asp.net in which silverlight object is added

Question

I am creating an silverlight application in which i have created various page of silverlight and one asp.net page.i created one silverlight page as HOME page.this page work as master page(i.e on left side of page there is a link to other page[LIKE Available Book page,Add Books Page]).when ever user user click on any link the middle portion of page changes and new page content came there without distracting link means link is always on left side whether u go to nay page just like master page concept.BUT MY problem is that when ever user click F5 or refresh the page using browser refresh button it again start from HOME page.

 plz if any one know help me in solving this problem(i.e HOW TO REFRESH PAGE REFRESH OF BROWSER)