ToDoListController.cs

[Produces("application/json")]
[Route("api/ToDo")]
public class ToDoListController : Controller
{
    private readonly ToDoListContext _context;

    public ToDoListController(ToDoListContext context)
    {
        _context = context;
    }

    // GET: api/ToDo
    [HttpGet]
    public IEnumerable<ToDoList> GetToDo()
    {
        return _context.ToDoLists;
    }

    // POST: api/ToDo
    [HttpPost]
    public async Task<IActionResult> PostToDo([FromBody] ToDoList todo)
    {
        if (!ModelState.IsValid)
            return BadRequest(ModelState);

        _context.ToDoLists.Add(todo);
        await _context.SaveChangesAsync();
        return CreatedAtAction("GetToDo", new { id = todo.ID }, todo);
    }

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

        if (id != todo.ID)
            return BadRequest();

        _context.Entry(todo).State = EntityState.Modified;
        try
        {
            await _context.SaveChangesAsync();
        }
        catch (DbUpdateConcurrencyException)
        {
            if (!ToDoExists(id))
                return NotFound();
            else
                throw;
        }
        return NoContent();
    }

    // DELETE: api/ToDo/5
    [HttpDelete("{id}")]
    public async Task<IActionResult> DeleteToDo([FromRoute] int id)
    {
        var ToDo = await _context.ToDoLists.SingleOrDefaultAsync(m => m.ID == id);
        if (ToDo == null)
            return NotFound();

        _context.ToDoLists.Remove(ToDo);
        await _context.SaveChangesAsync();
        return Ok(ToDo);
    }

    private bool ToDoExists(int id)
    {
        return _context.ToDoLists.Any(e => e.ID == id);
    }
}