rozpoznawanie emaili

var uri = "https://southcentralus.api.cognitive.microsoft.com/customvision/v2.0/Prediction/f1d565db-788a-4108-b77c-59cbe586e502/url?iterationId=6be50293-23bb-4f06-9024-260d7df2cc14";
            var client = new HttpClient();
            var httpRequestMessage = new HttpRequestMessage
            {
                RequestUri = new Uri(uri),
                Method = HttpMethod.Post,
                Headers = {
                    {"Prediction-Key", "3c16885353b24d5991593fa8f81c265f"},
                    {"Prediction-Key", "application/json"}
                },
                Content = new ByteArrayContent(Encoding.UTF8.GetBytes("{\"Url\": \"https://1.bp.blogspot.com/-cE_2wW92BnA/WZ107180o-I/AAAAAAAAAHc/eWtKLeahdhEADY_ULvRch2bXluKxT8kYgCLcBGAs/s728-e100/email-exploit.png\"}"))
            };

           var resp = await client.SendAsync(httpRequestMessage);

            return await resp.Content.ReadAsStringAsync();