The exception thrown if Connect or Close failed.
Namespace: EnterpriseDT.Net.FtpAssembly: edtFTPnetPRO (in edtFTPnetPRO.dll) Version: 9.4.0.40
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.