private void button1_Click(object sender, EventArgs e) { Kairos.API.KairosClient client = new Kairos.API.KairosClient(); client.ApplicationID = "c4214740"; client.ApplicationKey = "64cbdf468dc6a3523e4393b63735cdcf"; // Detect the face(s) var detectResponse = client.Detect("http://wellness.18signals.com/kairos.jpg"); // Get the image and face information var detectImage = detectResponse.Images[0]; var face = detectImage.Faces[0]; // Enroll the user var enrollResponse = client.Enroll(detectImage.image_id, "humbywan1234", face.topLeftX, face.topLeftY, face.width, face.height); // Get the user enrollment transaction info var userImage = enrollResponse.Images[0].Transaction; // Recognize the user var user = client.Recognize(userImage.image_id, face.topLeftX, face.topLeftY, face.width, face.height); // Detected user ID var userID = user.Images[0].Candidates.First().Key; }