leetcode349

public class Solution {

    public int[] Intersection(int[] nums1, int[] nums2) {

        var list1 = nums1.ToList();

            var list2 = nums2.ToList();

            var list = list1.Intersect(list2);

            return list.ToArray<int>();

    }

}

https://leetcode.com/problems/intersection-of-two-arrays/#/description