Socket.Receive / Encoding problem

Question

hi there's a web proxy sample in c# at: http://www.c-sharpcorner.com/internet/web_proxy.asp i'm trying to implement something similar and have a question about it: it works with html files but i can't get it to work with zip, jpg, exe and others. actually jpg works when using the encoding.unicode (instead of ascii) functions, but the others won't. any ideas how to (correctly) get around this (encoding?) problem? thx in advance