C#编程-142：新增注册表

using System;
using System.Windows.Forms;
using Microsoft.Win32;
namespace RegistryTestSetValue
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private void btnSetup_Click(object sender, EventArgs e)
        {
            if (txtKey.Text == "") {
                MessageBox.Show("输入错误");
                return ;}
            RegistryKey hklm = Registry.LocalMachine;
            RegistryKey sys = hklm.OpenSubKey("System",true);
            RegistryKey temp = sys.CreateSubKey(txtKey.Text);
            temp.SetValue(txtName.Text,txtValue.Text);
            //listBox1.Items.Clear();
            foreach (string site in sys.GetSubKeyNames())
            {
                if (txtKey.Text == site)
                {
                    RegistryKey sitekey = sys.OpenSubKey(site);
                    foreach (string svalue in sitekey.GetSubKeyNames())
                    {
                        listBox1.Items.Add(sitekey+svalue + " : " + sitekey.GetValue(svalue));
                    }
                }
            }
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            RegistryKey hklm = Registry.LocalMachine;
            RegistryKey sys = hklm.OpenSubKey("System");
            listBox1.Items.Clear();
            foreach (string subkey in sys.GetSubKeyNames())
            {
                listBox1.Items.Add(subkey);
            }
        }
    }
}