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

        public TodoList ToEntity()
        {
            TodoList todo = new TodoList
            {
                Title = Title,
                TodoListId = TodoListId,
                UserId = UserId,
                Todos = new List<TodoItem>()
            };
            foreach (TodoItemDto item in Todos)
            {
                todo.Todos.Add(item.ToEntity());
            }

            return todo;
        }

        public HttpResponseMessage PostTodoList(TodoListDto todoListDto)
        {
            if (!ModelState.IsValid)
            {
                return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState);
            }

            todoListDto.UserId = User.Identity.Name;
            TodoList todoList = todoListDto.ToEntity();
            db.TodoLists.Add(todoList);
            db.SaveChanges();
            todoListDto.TodoListId = todoList.TodoListId;

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