c# - Linq orderby, start with specific number, then return to lowest

Question

I have a set of data which I'd like to re-order starting with a specific number and then, when the highest number is reached, go back to the lowest and then carry on incrementing.

For example, for the sequence (1,2,3,4,5,6), if 4 was the specific number, the order would become (4,5,6,1,2,3).

Is that possible with linq & c#?

Answer 1

List<int> list = new List<int>() { 1, 2, 3, 4, 5, 6 };
int num = 4;
var newList = list.SkipWhile(x=>x!=num)
                    .Concat(list.TakeWhile(x=>x!=num))
                    .ToList();