Why can't a program (in C#) interact with the server if fiddler2 is disabled?

Question

C++ / C#

What is the essence of the problem.
Given:
- desktop program in C#
- server to which the program connects
- fiddler2 for debugging and tracking network requests.
When I run the program, it
passes authorization, receives cookies.
- uses these cookies for the following actions.
Everything works if fiddler2 is running, if not, then the response from the server comes very strange, abracadabra of non-printable characters.
As I just did not pervert with the encoding, but apparently this is not the case, I will be very grateful if you help.

Answer 1

your program is able to process the response from the web server in a compressed form?
gzip

Answer 2

post the source somewhere in an archive chtoli ..