C# 設置應用程序開機自動運行

**//// <summary>
        /// 設置應用程序開機自動運行
        /// </summary>
        /// <param name="fileName">應用程序的文件名</param>
        /// <param name="isAutoRun">是否自動運行，為false時，取消自動運行</param>
        /// <exception cref="System.Exception">設置不成功時拋出異常</exception>
         public static void SetAutoRun(string fileName,bool isAutoRun) 
        ...{
            RegistryKey reg=null;
            try
            ...{
                if (!System.IO.File.Exists(fileName))
                    throw new Exception("該文件不存在!");
                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();
            }