Webservers tend to gzip outgoing data these days to save on bandwidth. Browsers tend to treat this as a code behind more then anything. Not sure but I see your using the .NET framework, you may be able to parse it out using an Common Internet Explorer control rather then a statement like get. Could have IE Retrieve then save as HTML or another type for file format temporarily then parse out the data from the temp file. Just a thought. Could also run the get through a gzip compression library as well. Both would take a little work, not sure which one would get you there faster
-Curtis