In some cases there is a need to check if the url that is used to access a page corresponds to what we expect.

This can be done like this

if ( Request.RawUrl.ToString() == Url.Action("LogOut", "Account") ){
    //The url of the action was used to access this page (and no extra GET parameters or anything hinkey) - and any servername/ip we listen to was used
}

This differs from getting the URI in the way that this is the RawUrl is only the part after the server (so for http://example.com/url/to/stuffs RawUrl would contain /url/to/stuffs where the URI would contain details about how the user got there.

system.web.httprequest.rawurl at msdn