c# 多線程及同步異步問題

c# 多線程及同步異步問題：

https://www.cnblogs.com/w6w6/p/10648921.html

同步異步代碼：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }


        //異步方法
        private void button1_Click(object sender, EventArgs e)
        {
            Console.WriteLine($"***************btnAsync_Click Start {Thread.CurrentThread.ManagedThreadId}");
            Action<string> action = this.DoSomethingLong;
            // 調用委託(同步調用)
            //action.Invoke("btnAsync_Click_1");
            // 異步調用委託
            action.BeginInvoke("btnAsync_Click_2", null, null);

            for (int i = 0; i < 5; i++)
            {
                string name = string.Format($"btnSync_Click_{i}");
               // this.DoSomethingLong(name);
                action.BeginInvoke(name, null, null);
            }

            Console.WriteLine($"***************btnAsync_Click End    {Thread.CurrentThread.ManagedThreadId}");
        }

        //同步方法
        //等待上一步操作執行完,在進行下一步操作
        private void button2_Click(object sender, EventArgs e)
        {
            Console.WriteLine($"****************btnSync_Click Start {Thread.CurrentThread.ManagedThreadId.ToString("00")} {DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff")}***************");
            int j = 3;
            int k = 5;
            int m = j + k;
            for (int i = 0; i < 5; i++)
            {
                string name = string.Format($"btnSync_Click_{i}");
                this.DoSomethingLong(name);
            }
        }
        private void DoSomethingLong(string name)
        {
            Console.WriteLine($"****************DoSomethingLong {name} Start {Thread.CurrentThread.ManagedThreadId.ToString("00")} { DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff")}***************");
              long lResult = 0;
            for (int i = 0; i < 1000000000; i++)
            {
                lResult += i;
            }
            Console.WriteLine($"****************DoSomethingLong {name}   End {Thread.CurrentThread.ManagedThreadId.ToString("00")} {DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff")} {lResult}***************");
        }


    }
}

異步運行結果：

同步運行結果：

delegate及Aciton、Func的異同：
https://www.cnblogs.com/xuxiaoshuan/p/6844511.html