Question

I’ve an object that is include property ID with values between 101 and 199. How to order it like 199,101,102 ... 198?

In result I want to put last item to first.

Answer 1

The desired ordering makes no sense (some reasoning would be helpful), but this should do the trick:

int maxID = items.Max(x => x.ID); // If you want the Last item instead of the one
                                  // with the greatest ID, you can use
                                  // items.Last().ID instead.
var strangelyOrderedItems = items
    .OrderBy(x => x.ID == maxID ? 0 : 1)
    .ThenBy(x => x.ID);