C#讀取host檔案代碼

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.IO;using System.Text;using System.Windows.Forms;  namespace 讀取host檔案{    public partial class Form1 : Form    {        public Form1()        {            InitializeComponent();        }          private void button1_Click(object sender, EventArgs e)        {            string str;            StreamReader sr = new StreamReader(@"C:\windows\system32\drivers\etc" + "\\hosts", false);            str = sr.ReadToEnd().ToString();            sr.Close();            this.richTextBox1.Text = str;///讀取         }    } } @"C:\windows\system32\drivers\etc" + "\\hosts"檔案路徑

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