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

namespace WindowsFormsApplication2QXT111
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
        StreamReader myReader = new StreamReader(@"H:\t639\T639GSI\H_4\500\12041520.000",Encoding.GetEncoding("GB2312"));
        string myline = "";
            while(myline=myReader.ReadLine()!=null)
            {
            richTextBox1.AppendText(myline.ToString()+"\r\n");
            }
            myReader.Close();
        }
    }
}
运行时出俩错1  错误    1    无法将类型“bool”隐式转换为“string”   
                       2    错误    2    当前上下文中不存在名称“richTextBox1”