System IO C# by API

using System;
using System.IO;
class MainClass {
    static void Main(string[] args) {
        FileInfo file = new FileInfo("c:\\a.txt");
        // Display directory information.
        DirectoryInfo dir = file.Directory;
        Console.WriteLine("Checking directory: " + dir.Name);
        Console.WriteLine("In directory: " + dir.Name);
        Console.Write("Directory exists: ");
        Console.WriteLine(dir.Exists.ToString());
        if (dir.Exists) {
            Console.Write("Directory created: ");
            Console.WriteLine(dir.CreationTime.ToString());
            Console.Write("Directory last updated: ");
            Console.WriteLine(dir.LastWriteTime.ToString());
            Console.Write("Directory last accessed: ");
            Console.WriteLine(dir.LastAccessTime.ToString());
            Console.Write("Directory attribute list: ");
            Console.WriteLine(dir.Attributes.ToString());
            Console.WriteLine("Directory contains: " +
               dir.GetFiles().Length.ToString() + " files");
        }
        Console.WriteLine();
    }
}