public OutputDtoQueryAddress CheckFromDb(InputDtoAddAddress address) { var addressFromDb = _addressRepository.CheckFromDb(new Address { Street = address.Street, HomeNumber = address.HomeNumber, Zip = address.Zip, City = address.City }); if (addressFromDb == null) { return(null); } return(new OutputDtoQueryAddress { Id = addressFromDb.Id, Street = addressFromDb.Street, HomeNumber = addressFromDb.HomeNumber, Zip = addressFromDb.Zip, City = addressFromDb.City }); }