asp.netc#怎么在线备份、还原Access数据库？

using System;using System.IO;class Test {    public static void Main()     {        string path = @"c:\temp\MyTest.txt";        string path2 = path + "temp";        try         {            using (FileStream fs = File.Create(path)) {}            // Ensure that the target does not exist.            File.Delete(path2);            // Copy the file.            File.Copy(path, path2);            Console.WriteLine("{0} copied to {1}", path, path2);            // Try to copy the same file again, which should fail.            File.Copy(path, path2);            Console.WriteLine("The second Copy operation succeeded, which was not expected.");        }         catch (Exception e)         {            Console.WriteLine("Double copying is not allowed, as expected.");            Console.WriteLine(e.ToString());        }    }}