C#线程启动、暂停、恢复、停止怎么实现

论坛的高手你们好，本人是一个菜鸟，肯请大家帮个忙实现如下功能：
首先窗体界面如下：
C#线程启动、暂停、恢复、停止怎么实现

怎么实现“start”启动线程、“pause”暂停线程、“resume”恢复线程，“stop”停止线程，
直观现象是，按start启动计数，在右边输出，点pause，会暂停输出，然后点resume能够继续输出，点stop则停止输出（这时候再点resume没反应，只能点start开始重新输出）
下图是暂停，但是本人没法儿恢复继续输出
C#线程启动、暂停、恢复、停止怎么实现

在此，小弟先行谢过了！

解决方案

namespace Test
{ 
    
    public partial class Form4 : Form
    {
        public Form4()
        {
            InitializeComponent();
            Label.CheckForIllegalCrossThreadCalls = false;
        }
        Thread thread;
        ManualResetEvent ma;
        bool on_off = false;
        bool stop = false;
        private void button1_Click(object sender, EventArgs e)
        {
            thread = new Thread(Runtime);
            thread.Start();
        }
        void Runtime()
        {
            for (int i = 1; i <= 100; i++)
            {
                if (stop)
                    return;
                if (on_off)
                {
                    ma = new ManualResetEvent(false);
                    ma.WaitOne();
                }
                textBox1.AppendText("计时 :" + i + "\r\n");
                Thread.Sleep(100);
            }
        }
        private void button2_Click(object sender, EventArgs e)
        {
            on_off = true;
            textBox1.AppendText("暂停中 :\r\n");
        }
        private void button3_Click(object sender, EventArgs e)
        {
            on_off = false;
            ma.Set();
            textBox1.AppendText("继续计时 :\r\n");
        }
        private void button4_Click(object sender, EventArgs e)
        {
            stop = true;
            textBox1.AppendText("停止计时 \r\n");
        }
    }
}

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Threading;
using System.Windows.Forms;
namespace 线程挂起测试
{
public partial class Form1 : Form
{
static AutoResetEvent myResetEvent = new AutoResetEvent(false);
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
Control.CheckForIllegalCrossThreadCalls = false;
}

private void button1_Click(object sender, EventArgs e)
{
多线程();
PT();
}

private void button2_Click(object sender, EventArgs e)
{
PD = false;
}
private void button3_Click(object sender, EventArgs e)
{
PD = true;
PT();
}
private void 多线程()//创建线程执行计时
{
ThreadStart entry = new ThreadStart(计时);
Thread workThread = new Thread(entry);
workThread.IsBackground = true;
workThread.Start();
//a = workThread.GetHashCode();
}
private void 计时()
{
textBox1.Text = “逐个计数到100为止\r\n”;
for (int i = 0; i < 101; i++)
{
textBox1.Text += “逐秒计时” + i + “\r\n”;
Thread.Sleep(1000);
myResetEvent.WaitOne();
}
}
private bool PD = true; //false
private void 判断能否执行()
{
while (PD)
{
myResetEvent.Set();
}

}
private void PT()//创建后台线程执行判断能否执行
{
ThreadStart entry = new ThreadStart(判断能否执行);
Thread workThread = new Thread(entry);
workThread.IsBackground = true;
workThread.Start();
}
}
}
退出线程没写留给你本人写了本人倒是想写直接退出程序