/// <summary>
/// Request the server to set up the put
/// </summary>
/// <param name="remoteFile"> name of remote file in
/// current directory
/// </param>
/// <param name="append"> true if appending, false otherwise
///
/// </param>
private void InitPut(string remoteFile, bool append)
{
// set up data channel
data = control.CreateDataSocket(connectMode);
// send the command to store
string cmd = append ? "APPE ":"STOR ";
string reply = control.SendCommand(cmd + remoteFile);
// Can get a 125 or a 150
string[] validCodes = new string[] { "125", "150" };
lastValidReply = control.ValidateReply(reply, validCodes);
}