The already open ULConnection that is used to perform the bulk-copy operation. If the connection is not open, an exception
is thrown in WriteToServer.
A combination of values from the ULBulkCopyOptions enumeration that determines how data source rows are copied to
the destination table.
An existing ULTransaction instance under which the bulk copy occurs. If externalTransaction is not a null reference
(Nothing in Visual Basic), then the bulk-copy operation is done within it. It is an error to specify both an external transaction
and the ULBulkCopyOptions.UseInternalTransaction option.