public IHttpActionResult UpdateCustomer(CustomerModel customerToUpdate)
        {
            var entity = new Customer()
            {
                CustomerID   = customerToUpdate.CustomerID,
                Address      = customerToUpdate.Address,
                City         = customerToUpdate.City,
                CompanyName  = customerToUpdate.CompanyName,
                ContactName  = customerToUpdate.ContactName,
                ContactTitle = customerToUpdate.ContactTitle,
                Country      = customerToUpdate.Country,
                Fax          = customerToUpdate.Fax,
                Phone        = customerToUpdate.Phone,
                PostalCode   = customerToUpdate.PostalCode,
                Region       = customerToUpdate.Region
            };

            _repository.UpdateCustomer(entity);
            return(Ok <CustomerModel>(customerToUpdate));
        }