在c#中屏幕抓取一个windows应用程序

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

namespace ScreenCapture
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            // 获取屏幕尺寸
            int screenWidth = Screen.PrimaryScreen.Bounds.Width;
            int screenHeight = Screen.PrimaryScreen.Bounds.Height;

            // 创建一个位图对象
            Bitmap bitmap = new Bitmap(screenWidth, screenHeight);

            // 创建一个Graphics对象
            Graphics graphics = Graphics.FromImage(bitmap as Image);

            // 抓取屏幕图像
            graphics.CopyFromScreen(0, 0, 0, 0, new Size(screenWidth, screenHeight));

            // 保存图像到文件
            string fileName = "screenshot.png";
            bitmap.Save(fileName, ImageFormat.Png);

            // 显示图像
            pictureBox1.Image = bitmap;
        }
    }
}