Stripped down copy of scaffolded controller using Entity Framework

PersonController.cs

// GET: api/Person
[HttpGet]
public IEnumerable<Person> GetPerson()
{
    return _context.Person;
}

// GET: api/Person/5
[HttpGet("{id}")]
public async Task<IActionResult> GetPerson([FromRoute] int id)
{
    if (!ModelState.IsValid)
    {
        return BadRequest(ModelState);
    }

    var person = await _context.Person.FindAsync(id);

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

    return Ok(person);
}

// PUT: api/Person/5
[HttpPut("{id}")]
public async Task<IActionResult> PutPerson([FromRoute] int id, [FromBody] Person person)
{
    if (!ModelState.IsValid)
    {
        return BadRequest(ModelState);
    }

    if (!PersonExists(id))
    {
        return NotFound();
    }

    return NoContent();
}

// POST: api/Person
[HttpPost]
public async Task<IActionResult> PostPerson([FromBody] Person person)
{
    if (!ModelState.IsValid)
    {
        return BadRequest(ModelState);
    }

    return CreatedAtAction("GetPerson", new { id = person.Id }, person);
}

// DELETE: api/Person/5
[HttpDelete("{id}")]
public async Task<IActionResult> DeletePerson([FromRoute] int id)
{
    if (!ModelState.IsValid)
    {
        return BadRequest(ModelState);
    }

    var person = await _context.Person.FindAsync(id);
    if (person == null)
    {
        return NotFound();
    }

    return Ok(person);
}