Eject CD/DVD in WinPE environment

Program.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;

namespace EjectMedia
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("args: {0}", args[0]);
            Console.WriteLine("Attempting to eject disc...");
            EjectMedia.Eject(args[0]);
        }
    }

    class EjectMedia
    {
        // Constants used in DLL methods
        const uint GENERICREAD = 0x80000000;
        const uint OPENEXISTING = 3;
        const uint IOCTL_STORAGE_EJECT_MEDIA = 2967560;
        const int INVALID_HANDLE = -1;

        // File Handle
        private static IntPtr fileHandle;
        private static uint returnedBytes;
        // Use Kernel32 via interop to access required methods
        // Get a File Handle
        [DllImport("kernel32", SetLastError = true)]
        static extern IntPtr CreateFile(string fileName, uint desiredAccess, uint shareMode, IntPtr attributes, uint creationDisposition, uint flagsAndAttributes, IntPtr templateFile);
         
        [DllImport("kernel32", SetLastError=true)]
        static extern int CloseHandle(IntPtr driveHandle);
         
        [DllImport("kernel32", SetLastError = true)]
        static extern bool DeviceIoControl(IntPtr driveHandle, uint IoControlCode, IntPtr lpInBuffer, uint inBufferSize, IntPtr lpOutBuffer, uint outBufferSize, ref uint lpBytesReturned, IntPtr lpOverlapped);

        public static void Eject(string driveLetter)
        {
                try
                {         
                    // Create an handle to the drive
                    fileHandle = CreateFile(driveLetter, GENERICREAD, 0, IntPtr.Zero, OPENEXISTING, 0, IntPtr.Zero);
                    if ((int)fileHandle != INVALID_HANDLE)
                    {
                        // Eject the disk
                        DeviceIoControl(fileHandle, IOCTL_STORAGE_EJECT_MEDIA, IntPtr.Zero, 0, IntPtr.Zero, 0, ref returnedBytes, IntPtr.Zero);
                    }
                }
                catch
                {
                        throw new Exception(Marshal.GetLastWin32Error().ToString());
                }
                finally
                {
                        // Close Drive Handle
                        CloseHandle(fileHandle);
                        fileHandle = IntPtr.Zero;
                }
        }
    }
}