https://screenshotlayer.com/documentation是我最近能找到的唯一免费服务…
您需要使用HttpWebRequest下载图像的二进制文件。有关详细信息，请参见上面提供的url。
HttpWebRequest request = HttpWebRequest.Create("https://[url]") as HttpWebRequest;
Bitmap bitmap;
using (Stream stream = request.GetResponse().GetResponseStream())
{
bitmap = new Bitmap(stream);
}
// Now that you have a bitmap, you can do what you need to do...
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