读取windows注册表里的内容

private void Form1_Load(object sender, EventArgs e)
{
            //创建RegistryKey实例
            RegistryKey regkey = Registry.LocalMachine;

            //使用OpenSubKey方法打开HKEY_LOCAL_MACHINE\SOFTWARE键
            RegistryKey sys = regkey.OpenSubKey(@"SOFTWARE");

            //调用foreach语句读取HKEY_LOCAL_MACHINE\SOFTWARE键下的所有项目
            foreach (string str in sys.GetSubKeyNames())
            {
                //将输出的内容输出到RichTextBox控件里
                richTextBox1.Text += str + "\n";
               
            }
}