how boost record zlib.net?

i'm controlling library try boost files dense zlib (on linux box, perhaps). here's i'm doing:

zlib.zinputstream zinput =
    new zlib.zinputstream(file.open(path, filemode.open, fileaccess.read));

while (stopbyte != (data = zinput.readbyte()))
{
  // check information here
}

zinput.close();

the information bytes review dense information bytes, i contingency doing something wrong.