C#WinForm实现线程的启动,挂起等操作

public partial class Form1 : Form
    {
        Thread t = null;
        public Form1()
        {
            InitializeComponent();
        }

       
        
        private void button1_Click(object sender, EventArgs e)
        {
            t = new Thread(new ThreadStart(Run));
            t.Start();
        }

        public  void Run()
        {
            for (int i = 1; i < 20000; i++)
            {
                this.Invoke(new Action(
                    () => {
                        this.richTextBox1.Text = "第" + i + "条记录同步完成";
                        this.progressBar1.Value = i / 200;
                        this.label2.Text = i / 200 + "%";
                    }
                    ));
                
                
                Thread.Sleep(10);
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            Thread.Sleep(5000);
            
        }

        private void button3_Click(object sender, EventArgs e)
        {
            if (t.ThreadState!=ThreadState.Suspended)
            {
                t.Suspend();
            }
            
            
        }

        private void button4_Click(object sender, EventArgs e)
        {
            if (t.ThreadState == ThreadState.Suspended)
            {
                t.Resume();
            }
        }

        private void button5_Click(object sender, EventArgs e)
        {
            t.Abort();
        }
        string str = "";
        private void button6_Click(object sender, EventArgs e)
        {
            t = new Thread(new ParameterizedThreadStart(RunB));
            A a = new A() { X = this.textBox1.Text, Y = this.textBox3.Text };
            t.Start(a);//启动线程
        }

        public void Run1()
        {
            str = "[" + this.textBox1.Text + "]";
            for (int i = 1; i < 20000; i++)
            {
                this.Invoke(new Action(
                    () => {
                        this.richTextBox1.Text = str+"第" + i + "条记录同步完成";
                        this.progressBar1.Value = i / 200;
                        this.label2.Text = i / 200 + "%";
                    }
                    ));


                Thread.Sleep(10);
            }
        }

        private void RunB(object a)
        {
            for (int i = 1; i < 20000; i++)
            {
                // Invoke （委托 ）
                // Action ( lambda )

                // Invoke ( new Action (   ()=>{}   ));

                this.Invoke(new Action(
                    () => {
                        this.richTextBox1.Text = ((A)a).X + "第" + i + "条记录同步完成" + ((A)a).Y;
                        this.progressBar1.Value = i / 200;

                        this.label2.Text = i / 200 + "%";
                    }
                    ));
                Thread.Sleep(10);
            }
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            Control.CheckForIllegalCrossThreadCalls = false;
            

        }

        class A
        {
            public string X { get; set; }
            public string Y { get; set; }
        }
    }