通过Cef.CefSharp实现网页截图，并发送邮件

需实现效果为，将一个网页内容截图并保存文件，最后通过邮件发送

private void button1_Click(object sender, EventArgs e)
{
   
	var to = "";//接收人邮箱
	var bodyUrl = "";//需要截图的网页地址
	//图片保存路径
	string destPath = "C:\\Users\\lwk123456\\Desktop\\图片\\";
	//生成图片名称
	var subject = "截图生成图片" + DateTime.Today.ToString("yyyy-MM-dd");
	string imageName = $"{
     subject}.jpeg";
	string extName = Path.GetExtension(imageName).ToLower();
	WebScreenshot screenshot = new WebScreenshot();
	screenshot.createImg(bodyUrl, destPath, imageName, 895, 3800);
	//由于需要通过邮件发送所以这里将图片转base64，方便加载
	//或者也可直接转为网络路径
	var picByte = screenshot.PictureTurnByte(Path.Combine(destPath, imageName));
	var picByteStr = Convert.ToBase64String(picByte);
	//邮件发送内容主体
	var body = $"<img src='data:image/{
     extName};base64,{
     picByteStr}'  alt='{
     subject}' />";
	bool res = sendEmail.Send(to, "", subject, body, false);
	MessageBox.Show($"截图成功,图片路径:{
     Path.Combine(destPath, imageName)}");
}

以下为具体实现

   /// <summary>
    /// 网页截图帮助类
    /// </summary>
    public class