.NET Framework Standard Library Annotated Reference, Volume 1: Base Class Library and Extended Numerics Library

Example

using System;
using System.IO;
namespace Samples
{
  public class DirectorySample
  {
    public static void Main()
    {
      string s = Directory.GetCurrentDirectory() +
                 @"\Test";
      Directory.CreateDirectory(s);
      DateTime d = Directory.GetLastWriteTime(s);
      Console.WriteLine("Last write time: {0}", d);
      d = d.AddYears(1);
      Directory.SetLastWriteTime(s, d);
      d = Directory.GetLastWriteTime(s);
      Console.WriteLine("Last write time: {0}", d);
    }
  }
}

The output is

Last write time: 10/06/2003 2:29:42 PM
Last write time: 10/06/2004 2:29:42 PM