Add LFL sample

sdk/face/Azure.AI.Vision.Face/tests/samples/Sample6_LargeFaceListAsync.cs

@@ -0,0 +1,53 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using Azure.AI.Vision.Face.Tests;
+using Azure.Core.TestFramework;
+using NUnit.Framework;
+
+namespace Azure.AI.Vision.Face.Samples
+{
+    public partial class Sample6_LargeFaceList : FaceSamplesBase
+    {
+        [Test]
+        public async Task FindSimilarFromLargeFaceListAsync()
+        {
+            var listClient = CreateServiceClient().GetLargeFaceListClientClient();
+
+            var listId = "lfl_family1";
+            await listClient.CreateAsync(listId, "Family 1", userData: "A sweet family", recognitionModel: FaceRecognitionModel.Recognition04);
+
+            var faces = new[]
+            {
+                new { UserData = "Dad", ImageUrl = new Uri(FaceTestConstant.UrlFamily1Dad1Image) },
+                new { UserData = "Mom", ImageUrl = new Uri(FaceTestConstant.UrlFamily1Mom1Image) },
+                new { UserData = "Son", ImageUrl = new Uri(FaceTestConstant.UrlFamily1Son1Image) }
+            };
+            var faceIds = new Dictionary<Guid, string>();
+
+            foreach (var face in faces)
+            {
+                var addFaceResponse = await listClient.AddFaceFromUrlAsync(listId, face.ImageUrl, userData: face.UserData);
+                faceIds[addFaceResponse.Value.PersistedFaceId] = face.UserData;
+            }
+
+            var operation = await listClient.TrainAsync(WaitUntil.Completed, listId);
+            await operation.WaitForCompletionResponseAsync();
+
+            var faceClient = CreateClient();
+            var detectResponse = await faceClient.DetectAsync(new Uri(FaceTestConstant.UrlFamily1Dad3Image), FaceDetectionModel.Detection03, FaceRecognitionModel.Recognition04, true);
+            var faceId = detectResponse.Value[0].FaceId.Value;
+
+            var findSimilarResponse = await faceClient.FindSimilarFromLargeFaceListAsync(faceId, listId);
+            foreach (var similarFace in findSimilarResponse.Value)
+            {
+                Console.WriteLine($"The detected face is similar to the face with '{faceIds[similarFace.PersistedFaceId.Value]}' ID {similarFace.PersistedFaceId} ({similarFace.Confidence})");
+            }
+
+            await listClient.DeleteAsync(listId);
+        }
+    }
+}