Returning 201 HTTP status code without URI in web API

One of the most common ways to return a 201 HTTP status code in web API is to return Created(). However, this method requires providing an URI.

        [HttpPost]
        public async Task<IActionResult> Create(CreateBookModel book)
        {

            // Logic to create book

            var createdBookUri = "/books/1"; // Sample url to new book

            return Created(createdBookUri, book);            
        }

If you only want to return 201 HTTP status code without URI, you can return ObjectResult instead

        [HttpPost]
        public async Task<IActionResult> Create(CreateBookModel book)
        {

            // Logic to create book

            return new ObjectResult(book)
            {
                StatusCode = StatusCodes.Status201Created
            };            
        }