Autodesk.Workspaces.AnnotationConverter.ReadJson C# (CSharp) Method

        public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
        {
            var obj = JObject.Load(reader);
            var title = obj["Title"].Value<string>();
            var guid = Guid.Parse(obj["Uuid"].Value<string>());

            // This is a collection of string Guids, which
            // should be accessible in the ReferenceResolver.
            var models = obj["SelectedModels"].Values<JValue>();

            var existing = models.Select(m => serializer.ReferenceResolver.ResolveReference(serializer.Context, m.Value<string>()));

            var nodes = existing.Where(m => typeof(NodeModel).IsAssignableFrom(m.GetType())).Cast<NodeModel>();
            var notes = existing.Where(m => typeof(NoteModel).IsAssignableFrom(m.GetType())).Cast<NoteModel>();

            var anno = new AnnotationModel(nodes, notes);
            anno.AnnotationText = title;
            anno.GUID = guid;

            return anno;
        }