ASP.NET_Core_SPAs.API.ContactsApiController.GetContact C# (CSharp) Method

        public async Task<IActionResult> GetContact([FromRoute] int id)
        {
            if (!ModelState.IsValid)
            {
                return BadRequest(ModelState);
            }

            var contact = await GetContacts().SingleAsync(m => m.Id == id);

            if (contact == null)
            {
                return NotFound();
            }

            return Ok(contact);
        }