如何使用C#.Net将屏幕捕获为视频？

using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Windows.Forms;

public class ScreenCapture
{
    public static void CaptureScreen(string fileName)
    {
        using (Bitmap bitmap = new Bitmap(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height))
        {
            using (Graphics graphics = Graphics.FromImage(bitmap))
            {
                graphics.CopyFromScreen(0, 0, 0, 0, bitmap.Size);
            }

            bitmap.Save(fileName, ImageFormat.Png);
        }
    }
}

Install-Package AForge.NET

using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using AForge.Video;
using AForge.Video.DirectShow;

public class ScreenCapture
{
    public static void CaptureScreen(string fileName)
    {
        // 获取屏幕设备
        FilterInfoCollection videoDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice);
        VideoCaptureDevice videoDevice = new VideoCaptureDevice(videoDevices[0].MonikerString);

        // 设置视频源为屏幕
        videoDevice.VideoSource = ScreenCaptureSource.Create();

        // 开始捕获
        videoDevice.Start();

        // 保存捕获的屏幕视频
        using (Bitmap bitmap = videoDevice.GetCurrentFrame())
        {
            bitmap.Save(fileName, ImageFormat.Png);
        }

        // 停止捕获
        videoDevice.Stop();
    }
}