C# 设置应用程序开机自动运行

/**//// <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>
         public static void SetAutoRun(string fileName,bool isAutoRun) 
        ...{
            RegistryKey reg=null;
            try
            ...{
                if (!System.IO.File.Exists(fileName))
                    throw new Exception("该文件不存在!");
                String name = fileName.Substring(fileName.LastIndexOf("/") + 1);
                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);
                else
                    reg.SetValue(name, false);
            }
            catch (Exception ex)
            ...{
                throw new Exception(ex.ToString());
            }
                finally
            ...{
                if(reg!=null)
                reg.Close();
            }

            
            

        }