public Response <string> AddNewCustomer(Models.CustomerDetails customer)
 {
     CustomerMockData.CustomerList.Add(customer);
     return(new Response <string>()
     {
         Body = "Customer Added",
         Code = Status.Success
     });
 }
        public Response <string> UpdateCustomer(int Id, Models.CustomerDetails customerDetails)
        {
            var customer = CustomerMockData.CustomerList.Where(x => x.Id == Id).FirstOrDefault();

            customer.FullName    = customerDetails.FullName;
            customer.PhoneNumber = customerDetails.PhoneNumber;
            return(new Response <string>()
            {
                Body = "Updated.", Code = Status.Success
            });
        }