internal void EndDataTransfer()
{
lock(this) {
if(m_dataStream == null)
throw new InvalidOperationException();
m_dataStream = null;
}
}
internal void BeginDataTransfer(FtpDataStream stream)
{
lock(this) {
if(m_dataStream != null)
throw new FtpDataTransferException();
m_dataStream = stream;
}
}