gitflow_visual_studio.Models.TodoItemDto.ToEntity C# (CSharp) Method

        public TodoItem ToEntity()
        {
            return new TodoItem
            {
                TodoItemId = TodoItemId,
                Title = Title,
                IsDone = IsDone,
                TodoListId = TodoListId
            };
        }

        // POST api/Todo
        public HttpResponseMessage PostTodoItem(TodoItemDto todoItemDto)
        {
            if (!ModelState.IsValid)
            {
                return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState);
            }

            TodoList todoList = db.TodoLists.Find(todoItemDto.TodoListId);
            if (todoList == null)
            {
                return Request.CreateResponse(HttpStatusCode.NotFound);
            }

            if (todoList.UserId != User.Identity.Name)
            {
                // Trying to add a record that does not belong to the user
                return Request.CreateResponse(HttpStatusCode.Unauthorized);
            }

            TodoItem todoItem = todoItemDto.ToEntity();

            // Need to detach to avoid loop reference exception during JSON serialization
            db.Entry(todoList).State = EntityState.Detached;
            db.TodoItems.Add(todoItem);
            db.SaveChanges();
            todoItemDto.TodoItemId = todoItem.TodoItemId;

            HttpResponseMessage response = Request.CreateResponse(HttpStatusCode.Created, todoItemDto);
            response.Headers.Location = new Uri(Url.Link("DefaultApi", new { id = todoItemDto.TodoItemId }));
            return response;
        }