C# ConsoleApplication sample

test.cs

using System;
using System.Text;

namespace ConsoleApplication
{
	class Program
	{
		static void Main(string[] args)
		{
		    Console.WriteLine("This program lists all the files in the directory:");

		    System.IO.DirectoryInfo dir = new System.IO.DirectoryInfo(@"C:\");
		    foreach (System.IO.FileInfo file in dir.GetFiles("*.*"))
		    {
		       Console.WriteLine("{0}, {1}", file.Name, file.Length);
		    }
		    Console.ReadLine();
		}
	}
}