c# - mask password string -

i'm creating c# windows forms app logs me in servers single click using mstsc. have admin name , password in code in plain text , wondered there way mask/hide password? store code in dropbox , prefer wasn't readable.

    private void runasadmin(string server)     {         process rdcprocess = new process();         rdcprocess.startinfo.filename = environment.expandenvironmentvariables(@"%systemroot%\system32\cmdkey.exe");         rdcprocess.startinfo.arguments = "/generic:termsrv/192.168.0.217 /user:" + "administrator" + " /pass:" + "mypassword";         rdcprocess.start(); 

use function encrypt , decrypt password.

 public function convertpassword(byval spassword string)         dim stempchar string         dim icount integer          icount = 1 len(spassword)             if asc(mid$(spassword, icount, 1)) < 128                 stempchar = ctype(asc(mid$(spassword, icount, 1)) + 128, string)             elseif asc(mid$(spassword, icount, 1)) > 128                 stempchar = ctype(asc(mid$(spassword, icount, 1)) - 128, string)             end if              mid$(spassword, icount, 1) = chr(ctype(stempchar, integer))         next icount          return spassword     end function