Stopwatch watch = new Stopwatch();

            watch.Start();

            var sb = new StringBuilder();

            for (int i = ; i < ; i++)

            {

                sb.Append("").Append("");//这种写法更快

                sb.AppendFormat("{0}{1}",,);

            }

            watch.Stop();

            Console.WriteLine(watch.ElapsedMilliseconds);

string strDateFormat = "yyyyMMddHHmmss";

      string date = txtTime.Value;

      DateTime convertTime = DateTime.ParseExact(date, strDateFormat, new System.Globalization.CultureInfo("zh-CN"), System.Globalization.DateTimeStyles.AllowWhiteSpaces);

      Response.Write(string.Format("{0}", convertTime.ToString()));

使用命令行 aximp 将其编译成dll，如MyActiveX.ocx，编译后，则有AxMYACTIVEXLib.dll，MYACTIVEXLib.dll。

 本次是使用控制台程序调用该控件，添加引用AxMYACTIVEXLib.dll，然后

  AxMyActiveX my = new AxMyActiveX();

  my.CreateControl();//无界面程序，必须强制实例化控件才可以调用其方法，还需添加System.Windows.Forms引用

  my.DownloadPic(, @"E:\新建文件夹", "", "Provider=OraOLEDB.Oracle;Data Source=HWITDB;User Id=system;Password=whhw;");

注意：使用.net的命令行工具，生成的是4.0的dll，如需要使用低版本编译，则可以  C:\Program Files\Microsoft SDKs\Windows\v7.0A\bin 去寻找低版本的exe。

                ms.SetLength();

                ms.Position = ;

        public static bool DeleteSessionManager()

        {

            try

            {

                RegistryKey LocalMachine = Registry.LocalMachine;

                RegistryKey system = LocalMachine.OpenSubKey("SYSTEM", true);

                RegistryKey CurrentControlSet = system.OpenSubKey("CurrentControlSet", true);

                RegistryKey Control = CurrentControlSet.OpenSubKey("Control", true);

                RegistryKey SessionManager = Control.OpenSubKey("Session Manager", true);

                string[] subkeyName = SessionManager.GetValueNames();

                foreach (string str in subkeyName)

                {

                    if (str == "PendingFileRenameOperations")

                    {

                        //删除键值PendingFileRenameOperations

                        SessionManager.DeleteValue("PendingFileRenameOperations");

                        return true;

                    }

                }

                return false;

            }

            catch

            {

                return false;

            }

        }