File Stream C#

using System;
using System.IO;
class Test 
{
    public static void Main() 
    {
        DirectoryInfo di = new DirectoryInfo(@"c:\MyDir");
        // Determine whether the directory exists.
        if (di.Exists) 
        {
                Console.WriteLine("That path exists already.");
                return;
        }
        di.Create();
        Console.WriteLine("The directory was created successfully.");
        di.Delete();
        Console.WriteLine("The directory was deleted successfully.");
    }
}