C#高级------泛型集合

 class Program
    {
        static void Main(string[] args)
        {
            //把两个集合合并，不能重复
            List<string> s1 = new List<string>() { "1","2","3"};
            List<string> s2 = new List<string>() { "4","5","6"};

            for (int i = 0; i < s2.Count; i++)
            {
                if (!s1.Contains(s2[i]))
                {
                    s1.Add(s2[i]);
                }
            }

            for (int i = 0; i < s1.Count; i++)
            {
                Console.WriteLine(s1[i]);
            }
            Console.ReadKey();
        }
    }

 class Program
    {
        static void Main(string[] args)
        {
           //随机生成10个1-100之间的数放到List中，要求这10个数不能重复，并都是偶数
            List<int> num = new List<int>();
            Random r = new Random();
            while (num.Count < 10)
            {
                int a = r.Next(1, 101);
                if (a % 2 == 0 && !num.Contains(a))
                {
                    num.Add(a);
                }
            }

            for (int i = 0; i < num.Count; i++)
            {
                Console.WriteLine(num[i]);
            }
            Console.ReadKey();
        }
    }

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace out_ref
{
    class Program
    {
        static void Main(string[] args)
        {
           //分拣奇偶数
            List<int> num = new List<int>() { 1,2,3,4,5,6,7,8,9,10};
            List<int> Jishu = new List<int>();
            List<int> Oushu = new List<int>();

            for (int i = 0; i <num.Count; i++)
            {
                if (num[i] % 2 == 0)
                {
                    //偶数
                    Oushu.Add(num[i]);
                }
                else
                { 
                    //奇数
                    Jishu.Add(num[i]);
                }
            }
            
            foreach (var item in Jishu)
            {
                Console.WriteLine(item);
            }
            Console.WriteLine("============================");
            foreach (var item in Oushu)
            {
                Console.WriteLine(item);
            }
            Console.ReadKey();
        }
    }
}