The difference between Server.Transfer and Response.Redirect in ASP.NETAmr Saafan
Server.Transfer processes the page from one page directly to the next page without making a round-trip back to the client’s browser. This way is faster, with a little less overhead on the server. However, it does not update the clients URL history list or current URL.
Response.Redirect, as expected, is used to redirect the user’s browser to another page or site. It does perform a trip back to the client where the client’s browser is actually redirected to the new page. The browser history list is updated to reflect the new address.