The CommandLine property is used to obtain the command that
was issued by the client, and is commonly used inside OnCommand
and OnResult event handlers to pre-process and post-process
client commands, respectively. If the command sent by the client is
used to perform an action on a file or directory, use the LocalPath
property to get the full path to the local file that is the target of
the command. Note that this property only returns the command, and not
the associated request headers.
This property should only be accessed within an event handler
because its value is specific to the client session that raised the
event. This property will always return an empty string when accessed
outside of an event handler.