C# IEnumerable Union&Intersect&Except

            string temp1 = "A,B,C,D,E,F,G,H,J,K";
            string temp2 = "H,J,K,L,M,N,O,P,Q,R";
            Console.WriteLine($"原始 A ：{temp1}");
            Console.WriteLine($"原始 B ：{temp2}");

            Console.WriteLine(new string('=',50));

            Console.WriteLine("并集：A Union B");
            Console.WriteLine(string.Join(",", temp1.Split(',').Union(temp2.Split(','))));

            Console.WriteLine(new string('=', 50));

            Console.WriteLine("交集：A Intersect B");
            Console.WriteLine(string.Join(",", temp1.Split(',').Intersect(temp2.Split(','))));

            Console.WriteLine(new string('=', 50));

            Console.WriteLine("差集：A Except B");
            Console.WriteLine(string.Join(",", temp1.Split(',').Except(temp2.Split(','))));