WinForm设置注册表自动启动

string path = Application.StartupPath;
            SetAutoRun(path + @"\AppName.exe", true);

 /// <summary>
        /// 设置应用程序开机自动运行
        /// </summary>
        /// <param name="fileName">应用程序的文件名</param>
        /// <param name="isAutoRun">是否自动运行,为false时，取消自动运行</param>
        /// <exception cref="system.Exception">设置不成功时抛出异常</exception>
        /// <returns>返回1成功，非1不成功</returns>
        public String SetAutoRun(string fileName, bool isAutoRun)
        {
            string reSet = string.Empty;
            RegistryKey reg = null;
            try
            {
                if (!System.IO.File.Exists(fileName))
                {
                    reSet = "该文件不存在!";
                }
                string name = fileName.Substring(fileName.LastIndexOf(@"\") + );
                reg = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Microsoft\Windows\CurrentVersion\Run", true);
                if (reg == null)
                {
                    reg = Registry.LocalMachine.CreateSubKey(@"SOFTWARE\Microsoft\Windows\CurrentVersion\Run");
                }
                if (isAutoRun)
                {
                    reg.SetValue(name, fileName);
                    reSet = "";
                }
                else
                {
                    reg.SetValue(name, false);
                }

            }
            catch (Exception ex)
            {
                threadMethod("设置自动启动注册表失败：" + ex.Message);
            }
            finally
            {
                if (reg != null)
                {
                    reg.Close();
                }
            }
            return reSet;
        }