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 file and directory listing item is received by the GetList()()()(), GetRawList()()()() or 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.

Occurs when a server certificate needs to be validated.