工作总结 c#如何将两个List集合合并

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

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            List<object> o1 = new List<object>() { 
                new { name = "1", id = "1" },
                new { name = "2", id = "2" },
                new { name = "3", id = "3" },
                new { name = "4", id = "4" },
            };

            List<object> o2 = new List<object>() { 
                new { name = "4", id = "4" },
                new { name = "4", id = "5" },
                new { name = "5", id = "5" },
                new { name = "6", id = "6" },
            };

            List<object> o3 = new List<object>() { 
                new { name = "7", id = "7" },
                new { name = "8", id = "8" },
                new { name = "6", id = "6" },
                new { name = "6", id = "5" },
            };
            var arrcount = o1.Union(o2).Union(o3).ToList();
            var arrcounts = o1.Concat(o2).Concat(o3).ToList();





            string[] str = { "a", "b", "c", "d" };
            str.Where(n => n == "a");
            str.Where(n => n == "b");
            int s = int.Parse("01");
            foreach (var item in str)
            {
                Console.WriteLine(item);
            }
        }
    }
}

 

https://bbs.csdn.net/topics/370079002  

 

List<int> listA = new List<int> {1,2,3,5,7,9};

List<int> listB = new List<int> {13,4,17,29,2};

 

List<int> Result = listA.Union(listB).ToList<int>();          //剔除重复项

List<int> Result = listA.Concat(listB).ToList<int>();          //保留重复项

 

 

 

 

剔除重复项  会 全部属性匹配 

 

第二个