スクリーンショットを撮る簡単なコンソールC#プログラム

using System.Drawing;
using System.Drawing.Imaging;
using System.Runtime.InteropServices;
using Spectre.Console;

namespace ScreenTest
{
    class Program
    {
        static void Main(string[] args)
        {
            while (true)
            {
                Image img = CaptureScreen();
                Bitmap bitmap = new Bitmap(img);
                MemoryStream ms = new MemoryStream();
                bitmap.Save(ms, ImageFormat.Png);
                CanvasImage consoleImage = new CanvasImage(ms.ToArray());
                consoleImage.MaxWidth = 50;
                AnsiConsole.Write(consoleImage);
                ms.Dispose();
                Console.Write("Input:");
                string strInput = Console.ReadLine() ?? "";
                if (strInput == "exit") break; // 'exit'と入力したら終わり
            }

        }
        private static Image CaptureScreen()
        {
            return CaptureWindow(GetDesktopWindow());
        }

        private static Image CaptureWindow(IntPtr handle)
        {
            IntPtr hdcSrc = GetWindowDC(handle);
            RECT windowRect = new RECT();
            GetWindowRect(handle, ref windowRect);
            int width = windowRect.right - windowRect.left;
            int height = windowRect.bottom - windowRect.top;
            IntPtr hdcDest = CreateCompatibleDC(hdcSrc);
            IntPtr hBitmap = CreateCompatibleBitmap(hdcSrc, width, height);
            IntPtr hOld = SelectObject(hdcDest, hBitmap);
            BitBlt(hdcDest, 0, 0, width, height, hdcSrc, 0, 0, SRCCOPY);
            SelectObject(hdcDest, hOld);
            DeleteDC(hdcDest);
            ReleaseDC(handle, hdcSrc);
            Image img = Image.FromHbitmap(hBitmap);
            DeleteObject(hBitmap);

            return img;
        }

        [StructLayout(LayoutKind.Sequential)]
        private struct RECT
        {
            public int left;
            public int top;
            public int right;
            public int bottom;
        }

        private const int SRCCOPY = 0x00CC0020; // BitBlt dwRop parameter

        [DllImport("gdi32.dll")]
        private static extern bool BitBlt(IntPtr hObject, int nXDest, int nYDest,
            int nWidth, int nHeight, IntPtr hObjectSource,
            int nXSrc, int nYSrc, int dwRop);
        [DllImport("gdi32.dll")]
        private static extern IntPtr CreateCompatibleBitmap(IntPtr hDC, int nWidth,
            int nHeight);
        [DllImport("gdi32.dll")]
        private static extern IntPtr CreateCompatibleDC(IntPtr hDC);
        [DllImport("gdi32.dll")]
        private static extern bool DeleteDC(IntPtr hDC);
        [DllImport("gdi32.dll")]
        private static extern bool DeleteObject(IntPtr hObject);
        [DllImport("gdi32.dll")]
        private static extern IntPtr SelectObject(IntPtr hDC, IntPtr hObject);
        [DllImport("user32.dll")]
        private static extern IntPtr GetDesktopWindow();
        [DllImport("user32.dll")]
        private static extern IntPtr GetWindowDC(IntPtr hWnd);
        [DllImport("user32.dll")]
        private static extern IntPtr ReleaseDC(IntPtr hWnd, IntPtr hDC);
        [DllImport("user32.dll")]
        private static extern IntPtr GetWindowRect(IntPtr hWnd, ref RECT rect);
    }
}