.netcore 根据图片url地址保存图片

 Uri url = new Uri($"https://static.com/wxyt/{dateTime.Year}/{month}/{timeStamp}.jpg");
                var client = _httpClientFactory.CreateClient();
                var result = client.GetAsync(url).Result;
                if (result.StatusCode == HttpStatusCode.OK)
                {
                    var stream = result.Content.ReadAsStream();
                    var imgs = Image.FromStream(stream);
                    imgs.Save(excelDirectory + $"/{timeStamp}.jpg");
                }