获取注册表的信息，以便判断是否已经设置开机启动。

#region 检查是否设置开机启动
        private void IsPowerboot()
        {
            ///Microsoft.win32提供了RegistryKey类，用来访问系统的注册表。
            ///定义注册表子Path
            string strRegPath = @"SOFTWARE\Microsoft\Windows\CurrentVersion\Run";
            ///创建两个RegistryKey类，一个将指向Root Path，另一个将指向子Path
            RegistryKey regRootKey;
            RegistryKey regSubKey;
            ///定义Root指向注册表HKEY_LOCAL_MACHINE节点
            regRootKey = Registry.LocalMachine;
            ///Registry枚举类提供了以下几种
            /*
            Registry.ClassesRoot-------------->指向注册表HKEY_CLASSES_ROOT节点
            Registry.CurrentConfig-------------->指向注册表HKEY_CURRENT_CONFIG节点
            Registry.CurrentUser-------------->指向注册表HKEY_CURRENT_USER节点
            Registry.DynData-------------->指向注册表HKEY_DYN_DATA节点(动态注册表数据)
            Registry.LocalMachine-------------->指向注册表HKEY_LOCAL_MACHINE节点
            Registry.PerformanceData-------------->指向注册表HKEY_PERFORMANCE_DATA节点
            Registry.Users-------------->指向注册表HKEY_USERS节点
            */
            regSubKey = regRootKey.OpenSubKey(strRegPath);
            string[] strDSNList = regSubKey.GetValueNames();
            foreach (string SDNList in strDSNList)
            {
                if (SDNList == "WinForm")
                {
                    isLogion = true;
                    this.cmb_Powerboot.Checked = true;
                    ///关闭
                    regSubKey.Close();
                    regRootKey.Close();
                    isLogion = false;
                    return;
                }
            }

            ///关闭
            regSubKey.Close();
            regRootKey.Close();
        }
        #endregion