But what to do if the username or the password contains characters like "@" or ":"?
this URL will fail to parse as CURL expects the server name after the first @.
The solution is to use the OptionUsername and OptionPassword properties for the name and password:
c.OptionUsername = "christian@mbs"
c.OptionPassword = "123456"
c.OptionURL = "ftp://ftp.someserver.com/test/file.txt"
I hope this helps you.