Get File extension name in CSharp

         //from w  ww .j a v  a 2 s.co m

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;

class MainClass
{
    static void Main(string[] args)
    {
        string[] files = Directory.GetFiles(@"c:\");
        foreach (string filename in files)
        {
            FileInfo file = new FileInfo(filename);
            Console.WriteLine(file.Extension);
        }
    }
}