C#中用CreateFile返回0xffffffff，GetLastError()返回0

C#中用CreateFile返回0xffffffff，GetLastError()返回0

[DllImport("kernel32.dll", SetLastError = false, CharSet = CharSet.Auto)]
        private static extern IntPtr CreateFile(string fileName, uint desiredAccess, uint shareMode, uint securityAttributes, uint creationDisposition, uint flagsAndAttributes, uint templateFile);

device = CreateFile(deviceList[i], 
                    DESIREDACCESS.GENERIC_READ | DESIREDACCESS.GENERIC_WRITE,
                    SHAREMODE.FILE_SHARE_READ | SHAREMODE.FILE_SHARE_WRITE,
                    0, 
                    CREATIONDISPOSITION.OPEN_EXISTING, 
                    FLAGSANDATTRIBUTES.FILE_FLAG_OVERLAPPED, 
                    0);
                int errCode = Marshal.GetLastWin32Error();
//errCode 返回0，device 返回0xffffffff

errCode 返回0，device 返回0xffffffff

######有什么解决的办法吗？

好好的你为什么要调用API去创建文件，c#自己有创建文件的方法呀