Occurs when an authentication request is received from the server that cannot be answered programmatically.

Occurs when a banner message is received from the server.

Occurs when a command is send to the server.

Occurs when a significant action occurs in Delete method. Notifies the client about currently processing directory, currently deleting file and progress of the delete.

Occurs when a fingerprint is received from the server and needs to be validated.

Occurs when a file and directory listing item is received by GetList()()()(), GetRawList()()()(), GetNameList()()()() or GetItems methods.

Occurs when a problem is detected in Download, Upload, Delete or GetItems methods, making it possible for the handler to choose a desired reaction.

Occurs when a response is received from the server.

Occurs when a significant action occurs in Download, Upload methods. Notifies the client about currently processing directory, currently transferring file and progress of the transfer.

Occurs when a significant action occurs in Download, Upload, Delete or GetItems methods. Notifies the client about traversing hierarchy structure.