Guaranteed Semaphore order?

The documentation for the .NET Semaphore class states that:

There is no guaranteed order, such as FIFO or LIFO, in which blocked threads enter the semaphore.

In this case, if I want a guaranteed order (either FIFO or LIFO), what are my options? Is this something that just isn't easily possible? Would I have to write my own Semaphore? I assume that would be pretty advanced.