C#的并集差集交集

　　　　　　　//Intersect 交集，Except 差集，Union 并集
            int[] a = { 1, 2, 3, 4, 5 ,6};
            int[] b = { 2, 4, 5,6, 7, 8, 9 };
            var jiaoJi = a.Intersect(b).ToList();//交集:2,4,5,6
            var aChaJi = a.Except(b).ToList();//差集:1,3
            var bChaJi = b.Except(a).ToList();//差集:7,8,9
            var bingJi = a.Union(b).ToList();//并集:1,2,3,4,5,6,7,8,9

            string s = "";
            for (int i = 0; i < jiaoJi.Count; i++)
            {
                s += jiaoJi[i] + ",";
            }
            Console.WriteLine("交集:"+s);
            string s1 = "";
            for (int i = 0; i < aChaJi.Count; i++)
            {
                s1 += aChaJi[i] + ",";
            }
            Console.WriteLine("差集:" + s1);
            string s2 = "";
            for (int i = 0; i < bChaJi.Count; i++)
            {
                s2 += bChaJi[i] + ",";
            }
            Console.WriteLine("差集:" + s2);
            string s3 = "";
            for (int i = 0; i < bingJi.Count; i++)
            {
                s3 += bingJi[i] + ",";
            }
            Console.WriteLine("并集:" + s3);
            Console.Read();