8. 集合操作符—【LINQ標準查詢操作符】

public class Distinct_LINQ    {        public static void Distinct_Print()        {            List<int> quantity = new List<int> { 1, 1, 2, 3, 4, 5, 6, 7, 7, 8, 9, 9, 10 };            IEnumerable<int> val = quantity.Distinct();            foreach (int i in val)            {                Console.WriteLine(i.ToString());            }                    }        public static void Union_Print()        {            int[] numbers1 = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };            int[] numbers2 = { 11, 12, 13, 14, 15, 16, 17, 18 };            IEnumerable<int> union = numbers1.Union(numbers2);            foreach (int i in union)            {                Console.WriteLine(i.ToString());            }        }        public static void Intersect_Print()        {            int[] numbers1 = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };            int[] numbers2 = { 1, 2, 13, 14, 5, 16, 7, 18 };            IEnumerable<int> intersect = numbers1.Intersect(numbers2);            foreach (int i in intersect)            {                Console.WriteLine(i.ToString());            }        }        public static void Except_Print()        {            int[] numbers1 = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };            int[] numbers2 = { 1, 2, 13, 14, 5, 16, 7, 18 };            IEnumerable<int> except = numbers1.Except(numbers2);            foreach (int i in except)            {                Console.WriteLine(i.ToString());            }        }    }