Get createmodified file date time in folder

bakhtawar says:

'C:\Users\Administrator\Desktop\New folder' is denied.

 You are not authorized to access above directory, so contact admin

ok now i get this date time .. in this folder files is create ine very 2 seconds so when time delay form2 seconds to 5 mint then i want to show alert automatically that file not create how to do this

    public static void Main()
        {

            while (true)
            {
                try
                {
                    string path = @"C:\Users\Administrator\Desktop\New folder";

                    //if (!File.Exists(path))
                    //{
                    //    File.Create(path);
                    //}
                    //else
                    //{
                    //    File.SetLastWriteTime(path, DateTime.Now);
                    //}
                    DateTime dt = File.GetLastWriteTime(path);
                    Console.WriteLine("the last time {0}", dt);
                    //Console.ReadLine();
                }
                catch (Exception e)
                {
                    Console.WriteLine("The process failed: {0}", e.ToString());
                }

            }

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ok