http://localhost:12345/site/page.aspx?q1=1&q2=2
HttpContext.Current.Request.Url.Host localhost
HttpContext.Current.Request.Url.Authority localhost:12345
HttpContext.Current.Request.Url.AbsolutePath /site/page.aspx
HttpContext.Current.Request.ApplicationPath /site
HttpContext.Current.Request.Url.AbsoluteUri http://localhost:12345/site/page.aspx?q1=1&q2=2
HttpContext.Current.Request.RawUrl /site/page.aspx?q1=1&q2=2
HttpContext.Current.Request.Url.PathAndQuery