C#操作注册表

 #region 操作注册表
        RegistryKey key = Registry.CurrentUser;

        string regPath = "software\\MyApp";

        /// <summary>
        /// 创建注册表
        /// 注意:注册表路径一定是"\\"而不是"\"
        /// </summary>    
        public void CreateRrg()
        {
            RegistryKey software = key.CreateSubKey(regPath);
            software.Close();
        }

        /// <summary>
        /// 写入注册表
        /// </summary>
        /// <param name="regPath">"software\\MyApp"</param>
        /// <param name="field">"ProductID"</param>
        /// <param name="value">"Leo Tian's blog"</param>
        public void WriteToReg(string field, string value)
        {
            RegistryKey software = key.OpenSubKey(regPath, true);
            software.SetValue(field, value);
            software.Close();
        }

        /// <summary>
        /// 读取
        /// </summary>
        public string ReadRegistry(string str)
        {
            string info = string.Empty;
            RegistryKey software = key.OpenSubKey(regPath, true);
            if (software != null)
            {
                info = software.GetValue(str).ToString();
                software.Close();
            }

            return info;
        }

        /// <summary>
        /// 删除注册表
        /// </summary>
        public void DeleteReg()
        {
            //删除
            key.DeleteSubKey(regPath, true);
        }

        public bool IsRegeditItemExist()
        {
            string[] subkeyNames;
            RegistryKey software = key.OpenSubKey("software", true);

            subkeyNames = software.GetSubKeyNames();
            //取得该项下所有子项的名称的序列，并传递给预定的数组中  
            foreach (string keyName in subkeyNames)
            {
                if (keyName == "MyApp")
                {
                    var value = Registry.GetValue("HKEY_CURRENT_USER\\Software\\MyApp", "RegisterCode", null);
                    var valueTime = Registry.GetValue("HKEY_CURRENT_USER\\Software\\MyApp", "RegisterTime", null);

                    if (value != null && valueTime!=null )
                    {
                        return true;
                    }
                    else
                    {
                        return false;
                    }
                }
            }

            return false;
        }

        #endregion