https://lviv.dotnet.city/2011/05/%d0%bf%d0%b0%d1%82%d0%b5%d1%80%d0%bd-%d0%b2%d1%96%d0%b2%d1%82%d0%be%d1%80%d0%ba%d0%b0-24-%d0%bf%d1%80%d0%be%d0%ba%d1%81%d1%96-proxy/