File.GetLastAccessTime
using System; using System.Windows.Forms; using System.IO; public class MainClass { [STAThread] public static void Main() { OpenFileDialog dlgOpen = new OpenFileDialog(); if (dlgOpen.ShowDialog() == DialogResult.OK) { string s = dlgOpen.FileName; Console.WriteLine("Filename " + s); Console.WriteLine(" Created at " + File.GetCreationTime(s)); Console.WriteLine(" Accessed at " + File.GetLastAccessTime(s)); } } }