WinAPI.cs

using System;
using System.Runtime.InteropServices;

namespace UsbTest_WinAPI
{
    public static class WinAPI
    {

        [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        public static extern IntPtr CreateFile(
            string lpFileName,
            uint dwDesiredAccess,
            uint dwShareMode,
            IntPtr lpSecurityAttributes,
            uint dwCreationDisposition,
            uint dwFlagsAndAttributes,
            IntPtr hTemplateFile);

        [DllImport("kernel32.dll", SetLastError = true)]
        public static extern bool WriteFile(
            IntPtr hFile,
            byte[] lpBuffer,
            uint nNumberOfBytesToWrite,
            out uint lpNumberOfBytesWritten,
            IntPtr lpOverlapped);

        [DllImport("kernel32.dll", SetLastError = true)]
        public static extern bool CloseHandle(IntPtr hObject);

        public const uint GENERIC_WRITE = 0x40000000;
        public const uint GENERIC_READ = 0x80000000;
        public const uint OPEN_EXISTING = 3;
        public const uint FILE_SHARE_WRITE = 2;

    }
}