public void DeleteCoach()
        {
            try
            {
                Console.WriteLine("Enter Coach id:");
                string id = Console.ReadLine();
                int    tryint;

                while (!int.TryParse(id, out tryint))
                {
                    Console.WriteLine("Incorrect id! Try again ");
                    id = Console.ReadLine();
                }

                using (swimmingContext swimdb = new swimmingContext())
                {
                    ICoachManager <Coach> coachManager = new CoachRepository(swimdb);
                    coachManager.Delete(Convert.ToInt32(id));
                    Console.WriteLine("Coach is deleted");
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }
        }
 public IHttpActionResult DeleteCoach(string username)
 {
     coachrepo.Delete(username);
     return(StatusCode(HttpStatusCode.NoContent));
 }