The exception thrown if Connect or Close failed.
Namespace: EnterpriseDT.Net.FtpAssembly: edtFTPnet (in edtFTPnet.dll) Version: 2.2.3.0
Syntax
Remarks
If this property is non-null during a [!:Closing] event then it means that
the connection was closed due to an error. In this case, if the exception is an
IOException then it usually means that the connection failed.