C# 检查反序列化的值是否为null

我有以下代码：

 Console.WriteLine("Deserilizing FolkbokföringsPost");
 var myPersons = Deserialize<List<FolkbokforingspostTYPE>>()
     .Select(x => new Person
     {
          PersonalIdentityNumber = x.Personpost.PersonId.PersonNr,
          SpecialIdentityNumber = x.Personpost.PersonId.Tilltalsnamnsmarkering != null ? x.Personpost.PersonId.Tilltalsnamnsmarkering : null,
          LastName = x.Personpost.Namn.Efternamn != null ? x.Personpost.Namn.Efternamn : null,
          FirstName = x.Personpost.Namn.Fornamn != null ? x.Personpost.Namn.Fornamn : null,
          NationalRegistrationCountyCode = x.Personpost.Folkbokforing.LanKod != null ? x.Personpost.Folkbokforing.LanKod : null,
          NationalRegistrationMunicipalityCode = x.Personpost.Folkbokforing.KommunKod != null ? x.Personpost.Folkbokforing.KommunKod : null,
          ForeignDistrubtionAddress1 = x.Personpost.Adresser.Utlandsadress != null ? x.Personpost.Adresser.Utlandsadress.Utdelningsadress1 : null,
          ForeignDistrubtionAddress2 = x.Personpost.Adresser.Utlandsadress != null ? x.Personpost.Adresser.Utlandsadress.Utdelningsadress2 : null,
          ForeignDistrubtionAddress3 = x.Personpost.Adresser.Utlandsadress != null ? x.Personpost.Adresser.Utlandsadress.Utdelningsadress3 : null,
          NationalRegistrationDistributionAddress1 = x.Personpost.Adresser.Folkbokforingsadress != null ? x.Personpost.Adresser.Folkbokforingsadress.Utdelningsadress1 : null,
          NationalRegistrationDistributionAddress2 = x.Personpost.Adresser.Folkbokforingsadress != null ? x.Personpost.Adresser.Folkbokforingsadress.Utdelningsadress2 : null,
          NationalRegistrationPostCode = x.Personpost.Adresser.Folkbokforingsadress != null ? x.Personpost.Adresser.Folkbokforingsadress.PostNr : null,
          UnregistrationReason = x.Personpost.Avregistrering != null ? x.Personpost.Avregistrering.AvregistreringsorsakKod : null,
          UnregistrationDate = x.Personpost.Avregistrering != null ? x.Personpost.Avregistrering.Avregistreringsdatum : null,
          NationalRegistrationCity = x.Personpost.Adresser.Folkbokforingsadress != null ? x.Personpost.Adresser.Folkbokforingsadress.Postort : null,
          NationalRegistrationDate = x.Personpost.Folkbokforing != null ? x.Personpost.Folkbokforing.Folkbokforingsdatum : null,

          if(x.Personpost.Fodelse.OrtUtlandet != null) //<-- The name 'x' does not exist in the current context
          {
               ForeignBirthCity = x.Personpost.Fodelse.OrtUtlandet != null ? x.Personpost.Fodelse.OrtUtlandet.FodelseortUtland : null, //<-- The name 'ForeignBirthCity' does not exist in the current context
          }

          ProtectedIdentity = x.Sekretessmarkering != null ? x.Sekretessmarkering : null, //<-- The name 'ProtectedIdentity' does not exist in the current context
          CitizenshipCode = x.Personpost.Medborgarskap.MedborgarskapslandKod != null ? x.Personpost.Medborgarskap.MedborgarskapslandKod : null //<-- The name 'CitizenshipCode' does not exist in the current context
     });

Console.WriteLine（“反序列化FolkbokföringsPost”）；
var myPersons=反序列化（）
.选择（x=>new Person
{
PersonalIdentityNumber=x.Personpost.PersonId.PersonNr，
SpecialIdentityNumber=x.Personpost.PersonId.Tilltalsnamnsmarkering！=null？x.Personpost.PersonId.Tilltalsnamnsmarkering:null，
LastName=x.Personpost.Namn.Efternamn！=null？x.Personpost.Namn.Efternamn:null，
FirstName=x.Personpost.Namn.Fornamn！=null？x.Personpost.Namn.Fornamn:null，
NationalRegistrationCountyCode=x.Personpost.FolkBookForing.LanKod！=null？x.Personpost.FolkBookForing.LanKod:null，
NationalRegistration市政代码=x.Personpost.FolkBookForing.KommunKod！=null？x.Personpost.FolkBookForing.KommunKod:null，
ForeignDistributionAddress1=x.Personpost.Addresser.UtlandsAddress！=null？x.Personpost.Addresser.UtlandsAddress1:null，
ForeignDistributionAddress2=x.Personpost.Adresser.UtlandsAddress！=null？x.Personpost.Adresser.UtlandsAddress2:null，
ForeignDistributionAddress3=x.Personpost.Adresser.UtlandsAddress！=null？x.Personpost.Adresser.UtlandsAddress3:null，
NationalRegistrationDistributionAddress1=x.Personpost.Addresser.FolkBookForingsAddress！=null？x.Personpost.Addresser.FolkBookForingsAddress.UtdelningsAddress1:null，
NationalRegistrationDistributionAddress2=x.Personpost.Addresser.FolkBookForingsAddress！=null？x.Personpost.Addresser.FolkBookForingsAddress.UTDelningsAddress2:null，
NationalRegistrationPostCode=x.Personpost.Addresser.FolkBookForingsAddress！=null？x.Personpost.Addresser.FolkBookForingsAddress.PostNr:null，
UnregistrationReason=x.Personpost.Avregistrering！=null？x.Personpost.Avregistrering.AvRegistreringOrsakkod:null，
UnregistrationDate=x.Personpost.Avregistrering！=null？x.Personpost.Avregistrering.AvRegistreringDatum:null，
NationalRegistrationCity=x.Personpost.Addresser.FolkBookForingsAddress！=null？x.Personpost.Addresser.FolkBookForingsAddress.Postort:null，
NationalRegistrationDate=x.Personpost.FolkBookForing！=null？x.Personpost.FolkBookForing.FolkBookForingsDatum:null，
如果（x.Personpost.Fodelse.OrtUtlandet！=null）/只需从代码中删除if语句，则由于

ForeignBirthCity = x.Personpost.Fodelse.OrtUtlandet != null ? x.Personpost.Fodelse.OrtUtlandet.FodelseortUtland : null,

请确保您的FolkBookForingsPostType类型的目标对象具有要反序列化的列表对象

应该是这样的：

 public class FolkbokforingspostTYPE
 {
  public List<Person> Person{get;set;}
 }

您的反序列化应该是这样的：

var obj= new List<FolkbokforingspostTYPE>(){
//intialize your object
}
var myPersons = Deserialize<List<FolkbokforingspostTYPE>>(obj);

var obj=新列表（）{
//初始化对象
}
var myPersons=反序列化（obj）；
查看类
FolkBookForingsPostType的代码会很有帮助
如果
Select（）
代码中有
语句，则无法写入
！
var obj= new List<FolkbokforingspostTYPE>(){
//intialize your object
}
var myPersons = Deserialize<List<FolkbokforingspostTYPE>>(obj);