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TElSftpVersionsExtension is a descendant of TSBSftpExtendedAttribute class.
Description
If the server supports other versions than what was negotiated,
it may wish to send the 'versions' extension to inform the client of
this fact. The client may then optionally choose to use one of the other versions supported.
After this extension receiving
OnVersionSelect event
is fired which allows to select protocol version.
Inherited from SBSftpExtendedAttribute
.NET: