怎么暂停程序执行，等待输入，输入完后继续

 private void button1_Click(object sender, EventArgs e)
        {
            Thread threadstart = new Thread(new ThreadStart(Mystart));
            threadstart.IsBackground = true;
            threadstart.Start();
        }
        private void richTextBox1_TextChanged(object sender, EventArgs e)
        {
            if (richTextBox1.Text.Length == 4)
            {
                detailCollectedEvent.Set();
            }
        }
        AutoResetEvent detailCollectedEvent = new AutoResetEvent(false);
        private void Mystart()
        {
            Con();
            detailCollectedEvent.WaitOne();
            SendPost(richTextBox1.Text);
        }

为啥我在richTextBox中输入完文本，程序不继续执行.求指点
[解决办法]
我这里测试可以。

按照你的程序修改的，新建一个窗体，添加一个RichTextBox一个Button，编写如下代码：

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

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

        private void button1_Click(object sender, EventArgs e)
        {
            Thread threadstart = new Thread(new ThreadStart(Mystart));
            threadstart.IsBackground = true;
            threadstart.Start();
        }
        private void richTextBox1_TextChanged(object sender, EventArgs e)
        {
            if (richTextBox1.Text.Length == 4)
            {
                detailCollectedEvent.Set();
            }
        }
        AutoResetEvent detailCollectedEvent = new AutoResetEvent(false);
        private void Mystart()
        {
            Step1();
            detailCollectedEvent.WaitOne();
            Step2();
        }

        private void Step2()
        {
            Invoke(new Action(() => this.Text = "2"));
        }

        private void Step1()
        {
            Invoke(new Action(() => this.Text = "1"));
        }
    }
}

看看问题是不是出在con sendpost里面。