public class Flash
{
    public static string FlashID
    {
        get
        {
            uint bytesreturned = 0;
            byte[] buffer = new byte[ 8 ];
            byte[] nullbuffer = new byte[ 1 ];
    
            string id = "";
            IntPtr hFlash = CreateFile("FSH1:", GENERIC_WRITE, 0, IntPtr.Zero, 0, OPEN_EXISTING, IntPtr.Zero);
    
            if(hFlash.ToInt32() == INVALID_HANDLE_VALUE)
            {
                throw new Exception("Error opening Flash driver");
            }
    
            int ret = DeviceIoControl(hFlash, IOCTL_READ_FLASH_ID, nullbuffer, 0, buffer, 8, ref bytesreturned, IntPtr.Zero);
    
            if((ret == 0))
            {
                throw new Exception("DeviceIoControl call failed: " + Marshal.GetLastWin32Error());
            }
    
            for(int i = 0 ; i < 4 ; i++)
            {
                id += String.Format("{0:X4}", BitConverter.ToUInt16(buffer, i * 2));
                if(i < 3)
                {
                    id += " ";
                }
            }
    
            return id;
        }
    }
    
    private const uint    IOCTL_READ_FLASH_ID        = 0x10;
    private const uint    GENERIC_WRITE            = 0x40000000;        
    private const int    OPEN_EXISTING            = 3;        
    private const int    INVALID_HANDLE_VALUE    = -1;        
    
    [DllImport("coredll.Dll")]
    private static extern int DeviceIoControl(IntPtr hDevice, 
        uint dwIoControlCode, 
        byte[] lpInBuffer, 
        uint nInBufferSize,
        byte[] lpOutBuffer,
        uint nOutBufferSize,
        ref uint lpBytesReturned,
        IntPtr lpOverlapped);
    
    [DllImport("coredll.dll")]        
    private static extern IntPtr CreateFile(string lpFileName,            
        uint dwDesiredAccess,
        int dwShareMode,
        IntPtr lpSecurityAttributes,
        int dwCreationDisposition,
        int dwFlagsAndAttributes,        
        IntPtr hTemplateFile);
    
    [DllImport("coredll.dll")]        
    private static extern bool CloseHandle(IntPtr hObject);        
}

static void Main(string[] args)
{
    try
    {
        Console.WriteLine("Flash ID = " + Flash.FlashID);
    }
    catch(Exception ex)
    {
        Console.WriteLine("Failed to get Flash ID\r\n" + ex.Message);
    }
    Console.ReadLine();
}