async Task GetSimilarFaces() { var detectSelectedPersonRes = await FaceApiService.DetectFaces(PersonSelected.FaceImageUrl); var similarFaces = await FaceApiService.GetSimilarFaces(detectSelectedPersonRes.FirstOrDefault().FaceId); List <Person> similarPersons = new List <Person>(); foreach (var similarFace in similarFaces) { var person = Persons.FirstOrDefault(p => p.LargeListFaceId == similarFace.PersistedFaceId); if (person != null) { person.ConfidenceSimilarity = similarFace.Confidence.ToString(); similarPersons.Add(person); } } SimilarPersons = new ObservableCollection <Person>(similarPersons); }