link如何实现N选1？请大家帮助我

Question

比如n=3
list1=1 2
list2=3 4
list3=5 6
结果
1 3 5
2 3 5
1 4 5
2 4 5
1 3 6
2 3 6
1 4 6
2 4 6

Answer 1

var query = lists[0].Select(x => new int[] { x });
for (int i= 1; i < lists.Count; i++)
{
query = lists.SelectMany(x => query.Select(y => y.Concat(new int[] { x })))
}