File Stream C#

using System;
using System.IO;
public class DirectoryUTCTime
{
    public static void Main()
    {
        string n = @"C:\";
        DateTime dtime1 = DateTime.Now;
        Directory.SetCreationTime(n, dtime1);
        Directory.SetLastAccessTimeUtc(n, dtime1);
        Console.WriteLine("Creation Date: {0}", Directory.GetCreationTime(n));
        Console.WriteLine("UTC creation Date: {0}", Directory.GetCreationTimeUtc(n));
        Console.WriteLine("Last write time: {0}", Directory.GetLastWriteTime(n));
        Console.WriteLine("UTC last write time: {0}", Directory.GetLastWriteTimeUtc(n));
        Console.WriteLine("Last access time: {0}", Directory.GetLastAccessTime(n));
        Console.WriteLine("UTC last access time: {0}", Directory.GetLastAccessTimeUtc(n));
        DateTime dtime2 = DateTime.Now;
        Directory.SetLastWriteTimeUtc(n, dtime2);
        Console.WriteLine("Changed last write time: {0}", Directory.GetLastWriteTimeUtc(n));
    }
}