public DesignTimeCustomerInsertViewModel()
 {
     ViewData = new CustomerInsertViewData()
     {
          City = "Odense",
          FirstName = "John",
          LastName = "Doe",
          MobileNumber = "000 000 000 000"
     };
 }
 public void InsertCustomer(CustomerInsertViewData data)
 {
     Customer cust = new Customer()
     {
         FirstName = data.FirstName,
         LastName = data.LastName,
         City = data.City,
         MobileNumber = data.MobileNumber,
     };
     cusRep.InsertAction(cust);
     context_db.SaveChanges();
     Messenger.NotifyColleagues(MessageTypes.MSG_CUSTOMER_INSERTED, data);
 }