I am having lambda expression where I am getting record when all the values are equal in input object and db object

var matchingrecord = (from data in dbContext.TableA
                       where data.Id == inputDto.Id &&                                             
                       data.AddTypeId == inputDto.AddressTypeId &&
                       inputDto.AddressLineOne == data.AddressLineOne) &&
                       (inputDto.AddressLineTwo == (data.AddressLineTwo ?? string.Empty)) &&
                   (inputDto.State ==null||(inputDto.State.stateId == data.State.StateId)) &&
                        (inputDto.City == data.City) &&
                        (inputDto.ZipCd == data.ZipCd)                                                  
                      select data).FirstOrDefault();

I need to include in where clause another field check(zipcodeExtn) only when zipcodeExtn is not null.

 (inputDto.City == data.City) &&
  (inputDto.ZipCd == data.ZipCd)   &&
(inputDto.zipcodeExtn=data.zipcodeExtn) // This should be added only when zipcodeExtn is not null

Please let med know if its possible to write one statement instead of adding if condition