Dictionary lock

using System;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Diagnostics;
using System.Collections;
using System.Collections.Generic;
using System.Collections.Concurrent;

namespace Test
{
    class Program
    {
        private static object objLock = new object();
        private static Dictionary<int, string> dict = new Dictionary<int, string>();

        public static void AddItem1()
        {
            lock (objLock)
            {
                Console.WriteLine("AddItem1()开始添加...    " + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"));

                for (int i = 10; i < 20; i++)
                {
                    dict.Add(i, DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"));

                    Thread.Sleep(TimeSpan.FromMilliseconds(1000));
                }

                Console.WriteLine("AddItem1()结束添加...    " + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"));
            }

            Console.WriteLine("AddItem1()退出方法体...  " + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss") + "\n");
        }
        public static void AddItem2()
        {
            lock (objLock)
            {
                Console.WriteLine("AddItem2()开始添加...    " + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"));

                for (int i = 50; i < 60; i++)
                {
                    dict.Add(i, DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"));

                    Thread.Sleep(TimeSpan.FromMilliseconds(1000));
                }

                Console.WriteLine("AddItem2()结束添加...    " + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"));
            }

            Console.WriteLine("AddItem2()退出方法体...  " + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss") + "\n");
        }



        private static ConcurrentDictionary<int, string> conDict = new ConcurrentDictionary<int, string>();
        public static void AddItem3()
        {
            Console.WriteLine("AddItem3()开始添加...    " + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"));

            for (int i = 10; i < 20; i++)
            {
                conDict.TryAdd(i, DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"));

                Thread.Sleep(TimeSpan.FromMilliseconds(1000));
            }

            Console.WriteLine("AddItem3()结束添加...    " + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"));

            Console.WriteLine("AddItem3()退出方法体...  " + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss") + "\n");
        }
        public static void AddItem4()
        {
            Console.WriteLine("AddItem4()开始添加...    " + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"));

            for (int i = 50; i < 60; i++)
            {
                conDict.TryAdd(i, DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"));

                Thread.Sleep(TimeSpan.FromMilliseconds(1000));
            }

            Console.WriteLine("AddItem4()结束添加...    " + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"));

            Console.WriteLine("AddItem4()退出方法体...  " + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss") + "\n");
        }


        static void Main()
        {
            var task1 = Task.Factory.StartNew(() =>
            {
                AddItem1();
            });

            var task2 = Task.Factory.StartNew(() =>
            {
                AddItem2();
            });

            Task.WaitAll(task1, task2);


            Console.WriteLine("Dictionary<int, string> dict = new Dictionary<int, string>();");
            Console.WriteLine(dict.Count.ToString());
            foreach (var item in dict)
            {
                Console.WriteLine("{0} - {1}", item.Key, item.Value);
            }

            Console.WriteLine("AddItem1,2执行完成");
            //Console.ReadLine();


            Task task3 = Task.Factory.StartNew(() =>
            {
                AddItem3();
            });
            task3.Wait();

            Console.WriteLine("t3:" + conDict.Count.ToString() + "\n");
            foreach (var item in conDict)
            {
                Console.WriteLine("{0} - {1}", item.Key, item.Value);
            }

            Task task4 = Task.Factory.StartNew(() =>
            {
                AddItem4();
            });
            task4.Wait();


            Console.WriteLine("\n");

            Console.WriteLine("ConcurrentDictionary<int, string> conDict = new ConcurrentDictionary<int, string>();");
            Console.WriteLine("ht:" + conDict.Count.ToString());
            foreach (var item in conDict)
            {
                Console.WriteLine("{0} - {1}", item.Key, item.Value);
            }

            Console.WriteLine("AddItem3,4执行完成");
            Console.ReadLine();
        }
    }
}

 

打印运行结果：

/*
AddItem1()开始添加...    2016-08-21 16:48:02
AddItem1()结束添加...    2016-08-21 16:48:12
AddItem1()退出方法体...  2016-08-21 16:48:12

AddItem2()开始添加...    2016-08-21 16:48:12
AddItem2()结束添加...    2016-08-21 16:48:23
AddItem2()退出方法体...  2016-08-21 16:48:23

Dictionary<int, string> dict = new Dictionary<int, string>();
20
10 - 2016-08-21 16:48:02
11 - 2016-08-21 16:48:03
12 - 2016-08-21 16:48:04
13 - 2016-08-21 16:48:05
14 - 2016-08-21 16:48:06
15 - 2016-08-21 16:48:07
16 - 2016-08-21 16:48:08
17 - 2016-08-21 16:48:09
18 - 2016-08-21 16:48:10
19 - 2016-08-21 16:48:11
50 - 2016-08-21 16:48:12
51 - 2016-08-21 16:48:13
52 - 2016-08-21 16:48:14
53 - 2016-08-21 16:48:15
54 - 2016-08-21 16:48:16
55 - 2016-08-21 16:48:18
56 - 2016-08-21 16:48:19
57 - 2016-08-21 16:48:20
58 - 2016-08-21 16:48:21
59 - 2016-08-21 16:48:22
AddItem1,2执行完成
 
AddItem3()开始添加...    2016-08-21 16:48:23
AddItem3()结束添加...    2016-08-21 16:48:33
AddItem3()退出方法体...  2016-08-21 16:48:33

t3:10
10 - 2016-08-21 16:48:23
11 - 2016-08-21 16:48:24
12 - 2016-08-21 16:48:25
13 - 2016-08-21 16:48:26
14 - 2016-08-21 16:48:27
15 - 2016-08-21 16:48:28
16 - 2016-08-21 16:48:29
17 - 2016-08-21 16:48:30
18 - 2016-08-21 16:48:31
19 - 2016-08-21 16:48:32
AddItem4()开始添加...    2016-08-21 16:48:33
AddItem4()结束添加...    2016-08-21 16:48:43
AddItem4()退出方法体...  2016-08-21 16:48:43


ConcurrentDictionary<int, string> conDict = new ConcurrentDictionary<int, string>();
ht:20
10 - 2016-08-21 16:48:23
11 - 2016-08-21 16:48:24
12 - 2016-08-21 16:48:25
13 - 2016-08-21 16:48:26
14 - 2016-08-21 16:48:27
15 - 2016-08-21 16:48:28
16 - 2016-08-21 16:48:29
17 - 2016-08-21 16:48:30
18 - 2016-08-21 16:48:31
19 - 2016-08-21 16:48:32
50 - 2016-08-21 16:48:33
51 - 2016-08-21 16:48:34
52 - 2016-08-21 16:48:35
53 - 2016-08-21 16:48:36
54 - 2016-08-21 16:48:37
55 - 2016-08-21 16:48:38
56 - 2016-08-21 16:48:39
57 - 2016-08-21 16:48:40
58 - 2016-08-21 16:48:41
59 - 2016-08-21 16:48:42
AddItem3,4执行完成
 
*/