c#窗体多线程无效,该怎么处理

c#窗体多线程无效

C# code

        private void button1_Click(object sender, EventArgs e)        {            textBox1.Text = "a";            textBox2.Text = "b";            Thread t1 = new Thread(new ThreadStart(Thread1));            t1.Start();            Thread t2 = new Thread(new ThreadStart(Thread2));            t2.Start();        }        public void Thread1() {            if (this.InvokeRequired) {                this.Invoke(new Action(Thread1));            }            else            {                int i = 0;                for (i = 0; i < 100; i++)                {                    textBox1.Text = "a" + i.ToString();                    Thread.Sleep(0);                    //Application.DoEvents();                }            }        }        public void Thread2()        {            if (this.InvokeRequired)            {                this.Invoke(new Action(Thread2));            }            else            {                int i = 0;                for (i = 0; i < 100; i++)                {                    textBox2.Text = "b" + i.ToString();                    Thread.Sleep(10);                    //Application.DoEvents();                }            }        }

程序可以运行，结果是当2运行完，1和2一起显示。请问如何做到他俩分别显示，谁运行完谁显示，不要一起显示。1和2的Thread.Sleep有区别

[解决办法]
Thread1 和 Thread2 两个方法改动下

C# code

public void Thread1(){    int i = 0;    for (i = 0; i < 100; i++)    {        this.Invoke((MethodInvoker)(() => textBox1.Text = "a" + i.ToString()));        Thread.Sleep(10);    }}public void Thread2(){    int i = 0;    for (i = 0; i < 100; i++)    {        this.Invoke((MethodInvoker)(() => textBox2.Text = "b" + i.ToString()));        Thread.Sleep(10);    }} 

 

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