how to set pixel format when call screenCapture.CaptureScreen()

[sgf]

            screenCaptureService = new DX9ScreenCaptureService();
            IEnumerable<GraphicsCard> graphicsCards = screenCaptureService.GetGraphicsCards();
            IEnumerable<Display> displays = screenCaptureService.GetDisplays(graphicsCards.First());
            screenCapture = screenCaptureService.GetScreenCapture(displays.First());
            captureZone = screenCapture.RegisterCaptureZone(0, 0, this.Width, this.Height);

        if (screenCapture.CaptureScreen())
        {
            using var _ = captureZone.Lock();
            img = captureZone.Image;// i want BGRA format here
            return true;
        }

[sgf]

the img looks like a = {ScreenCapture.NET.Image} [deleted] but the img.ColorFormat is ColorFormat.ARGB

Sorry, I misread.