Size of remote file (see remarks)
For the Downloading and Uploading events, the value of this property will be the size of the local file, since it is not yet known what size ASCII files will be once uploaded to the server.
Some servers do not support the command required to get the size of a particular file. In this case, or in case of an error, the FileSize
property will be -1.
FTPFileTransferEventArgs Class | EnterpriseDT.Net.Ftp Namespace