c# - WebClient FTP upload creates bin and hqx files -

i trying upload string ftp server. works creates bin , hqx file additionally. question is: how can omit these files when using webclient.

the code is:

using (webclient client = new webclient()) {     client.credentials = new networkcredential(setting.ftpusername, setting.ftppassword);     client.uploadstring(filename, json); }