首先，描述可能有点长，有很多代码，但我不想提供我能提供的所有信息。我正在为我的应用程序使用墓碑，我想保存一个序列化类：
[DataContract]
private class Tombstone
{
[DataMember]
public UserDetails UserProfile { get; set; }
}
// Create instance of the tombstone class
private Tombstone _tombstone;
public ProfileSetup()
{
_tombstone = new Tombstone();
}
//Add data to userProfile
void UserInformationAccess_OnGetUserDetailsComplete(GetUserDetailsResponse response)
{
_tombstone.UserProfile = response.userDetails;
}
而且我在从...导航的异常中就在这里：
protected override void OnNavigatedFrom(NavigationEventArgs e)
{
if (_tombstone != null)
this.SaveState("tombstone", _tombstone);
}
//The state manager class
public static class StateManager
{
/// <summary>
/// Saves a key-value pair into the state object
/// </summary>
/// <param name="phoneApplicationPage">The phone application page.</param>
/// <param name="key">The key.</param>
/// <param name="value">The value.</param>
public static void SaveState(this PhoneApplicationPage phoneApplicationPage, string key, object value)
{
if (phoneApplicationPage.State.ContainsKey(key))
{
phoneApplicationPage.State.Remove(key);
}
phoneApplicationPage.State.Add(key, value);
}
}
现在振作起来，异常即将来临：
“安全异常” 在 System.Runtime.Serialization.DataContract.DataContractCriticalHelper.CreateDataContract（Int32 id，RuntimeTypeHandle typeHandle，Type 类型） 在 System.Runtime.Serialization.DataContract.DataContractCriticalHelper.GetDataContractSkipValidation（Int32 id，RuntimeTypeHandle typeHandle，Type 类型） 在 System.Runtime.Serialization.DataContract.GetDataContractSkipValidation（Int32 id，RuntimeTypeHandle typeHandle，Type 类型） 在 System.Runtime.Serialization.DataContract.GetDataContract(RuntimeTypeHandle typeHandle, Type type, SerializationMode 模式) 在 System.Runtime.Serialization.XmlObjectSerializerContext.GetDataContract（RuntimeTypeHandle typeHandle，Type 类型） 在 System.Runtime.Serialization.XmlObjectSerializerWriteContext.SerializeWithXsiType（XmlWriterDelegator xmlWriter，对象 obj，RuntimeTypeHandle objectTypeHandle，类型 objectType，Int32 声明类型 ID，RuntimeTypeHandle 声明类型句柄，类型声明类型） 在 System.Runtime.Serialization.XmlObjectSerializerWriteContext.InternalSerialize（XmlWriterDelegator xmlWriter，对象 obj，布尔 isDeclaredType，布尔 writeXsiType，Int32 声明类型 ID，RuntimeTypeHandle 声明类型句柄） 在 System.Runtime.Serialization.XmlObjectSerializerWriteContext.InternalSerializeReference（XmlWriterDelegator xmlWriter，对象 obj，布尔 isDeclaredType，布尔 writeXsiType，Int32 声明类型 ID，RuntimeTypeHandle 声明类型句柄） 在 System.Reflection.RuntimeMethodInfo.InternalInvoke（RuntimeMethodInfo rtmi、Object obj、BindingFlags invokeAttr、Binder binder、Object 参数、CultureInfo 文化、Boolean isBinderDefault、Assembly caller、Boolean verifyAccess、StackCrawlMark 和 stackMark） 在 System.Reflection.RuntimeMethodInfo.InternalInvoke（对象 obj、BindingFlags invokeAttr、Binder binder、Object[] 参数、CultureInfo 文化、StackCrawlMark 和 stackMark） 在 System.Reflection.MethodBase.Invoke（对象 obj，对象 [] 参数） 在 System.Runtime.Serialization.XmlFormatWriter.InternalSerialize（MethodInfo 方法信息，对象 memberValue，类型 memberType，布尔 writeXsiType，XmlObjectSerializerWriteContext 上下文，XmlWriterDelegator xmlWriter） 在 System.Runtime.Serialization.XmlFormatWriter.WriteValue（类型 memberType，对象 memberValue，布尔 writeXsiType，XmlObjectSerializerWriteContext 上下文，XmlWriterDelegator xmlWriter） 在 System.Runtime.Serialization.XmlFormatWriter.WriteMember（SerializingObject serObj，Int32 memberIndex，ClassDataContract 派生的MostClassContract） 在 System.Runtime.Serialization.XmlFormatWriter.WriteClass（CallStackElement`1 callStackElement） 在 System.Runtime.Serialization.XmlFormatWriter.Serialize（XmlObjectSerializerWriteContext 上下文） 在 System.Runtime.Serialization.XmlFormatWriter.InitializeCallStack（XmlWriterDelegator xmlWriterDel，对象 obj，XmlObjectSerializerWriteContext writeContext，DataContract 合同） 在 System.Runtime.Serialization.CollectionDataContract.WriteXmlValue（XmlWriterDelegator xmlWriter，对象 obj，XmlObjectSerializerWriteContext 上下文） 在 System.Runtime.Serialization.XmlObjectSerializerWriteContext.WriteDataContractValue（DataContract 数据合同，XmlWriterDelegator xmlWriter，对象 obj，RuntimeTypeHandle 声明的TypeHandle） 在 System.Runtime.Serialization.XmlObjectSerializerWriteContext.SerializeWithoutXsiType（DataContract dataContract，XmlWriterDelegator xmlWriter，Object obj，RuntimeTypeHandle 声明的TypeHandle） 在 System.Runtime.Serialization.DataContractSerializer.InternalWriteObjectContent（XmlWriterDelegator writer，对象图） 在 System.Runtime.Serialization.DataContractSerializer.InternalWriteObject（XmlWriterDelegator writer，对象图） 在 System.Runtime.Serialization.XmlObjectSerializer.WriteObjectHandleExceptions（XmlWriterDelegator writer，对象图） 在 System.Runtime.Serialization.XmlObjectSerializer.WriteObject（XmlDictionaryWriter 编写器，对象图） 在 System.Runtime.Serialization.XmlObjectSerializer.WriteObject（流流，对象图） 在 Microsoft.Phone.Shell.StreamPersister.Serialize（IDictionary`2 字典，IEnumerable`1 knownTypes） 在 Microsoft.Phone.Shell.StreamPersister.Save（ShellPage shellPage，字符串键，IDictionary`2 字典，IEnumerable`1 knownTypes） 在 Microsoft.Phone.Controls.PhoneApplicationPage.InternalOnNavigatedFrom(NavigationEventArgs e) 在 System.Windows.Navigation.NavigationService.RaiseNavigated（对象内容，Uri uri，NavigationMode 模式，布尔 isNavigationInitiator，PhoneApplicationPage existingContentPage，PhoneApplicationPage newContentPage） 在 System.Windows.Navigation.NavigationService.Journal_NavigatedExternally（对象发件人，JournalEventArgs 参数） 在 System.Windows.Navigation.Journal.OnNavigatedExternally（字符串名称，Uri uri，NavigationMode 模式） 在 System.Windows.Navigation.Journal.ShellPage_NavigatedAway（对象发送者，NavigateAwayEventArgs args） 在 Microsoft.Phone.Shell.Interop.ShellPageCallback.FireOnNavigateAway(IntPtr thisPage, Direction direction, IntPtr pageNext)
我已经研究了很多与此相关的内容，但我发现是空的:(感谢任何帮助。
[编辑]
像问题的接缝是 TombStone 类具有私有可访问性，我改变了它......但我得到了以下异常：
不应使用数据合同名称“ArrayOfKeyValueOfstringJTokeneJCYCtcq:http://schemas.microsoft.com/2003/10/Serialization/Arrays”键入“Newtonsoft.Json.Linq.JObject”。将任何静态未知的类型添加到已知类型列表中 - 例如，通过使用 KnownTypeAttribute 属性或将它们添加到传递给 DataContractSerializer 的已知类型列表中。
这里也是 UserDetails 类
[KnownType(typeof(Phone[]))]
[KnownType(typeof(UserInterest<InterestCategory?, object>))]
[KnownType(typeof(UserInterest<InterestCategory?, object>[]))]
[DataContract]
public class UserDetails
{
/// <summary>
/// Specifies an identifier of user
/// </summary>
///
[DataMember]
public long userId { get; set; }
/// <summary>
/// Specifies a nick of user
/// </summary>
///
[DataMember]
public string nick { get; set; }
/// <summary>
/// Specifies a full name of user. The field is absent if it has null value
/// </summary>
[JsonProperty(NullValueHandling = NullValueHandling.Ignore)]
[DataMember]
public string fullName { get; set; }
/// <summary>
/// Specifies a gender of user. The field is absent if it has null value
/// </summary>
[JsonProperty(NullValueHandling = NullValueHandling.Ignore)]
[JsonConverter(typeof(EnumAttributeConverter<Gender>))]
[DataMember]
public Gender? gender { get; set; }
/// <summary>
/// Specifies a birthday of user as string in dd.MM.yyyy format.
/// The field is absent if it has null value.
/// </summary>
[JsonProperty(NullValueHandling = NullValueHandling.Ignore)]
[DataMember]
public string birthday { get; set; }
/// <summary>
/// Specifies an e-mail of user. The field is absent if it has null value
/// </summary>
[JsonProperty(NullValueHandling = NullValueHandling.Ignore)]
[DataMember]
public string email { get; set; }
/// <summary>
/// Specifies a website of user. The field is absent if it has null value.
/// </summary>
[JsonProperty(NullValueHandling = NullValueHandling.Ignore)]
[DataMember]
public string website { get; set; }
/// <summary>
/// Specifies a general information about user. The field is absent if it has null value.
/// </summary>
[JsonProperty(NullValueHandling = NullValueHandling.Ignore)]
[DataMember]
public string about { get; set; }
/// <summary>
/// Specifies a place of birth for user. The field is absent if it has null value.
/// </summary>
[JsonProperty(NullValueHandling = NullValueHandling.Ignore)]
[DataMember]
public Address<Country?>? homeAddress { get; set; }
/// <summary>
/// Specifies a place of residence for user. The field is absent if it has null value.
/// </summary>
[JsonProperty(NullValueHandling = NullValueHandling.Ignore)]
[DataMember]
public Address<Country?>? currentAddress { get; set; }
/// <summary>
/// Specifies a list of user's phones. The field is absent if it has null value.
/// </summary>
[JsonProperty(NullValueHandling = NullValueHandling.Ignore)]
[DataMember]
public Phone[] phones { get; set; }
/// <summary>
/// Specifies an URI of avatar of profile. The field is absent if it has null value.
/// </summary>
[JsonProperty(NullValueHandling = NullValueHandling.Ignore)]
[DataMember]
public string avatar { get; set; }
/// <summary>
/// Specifies a job. The field is absent if it has null value.
/// </summary>
[JsonProperty(NullValueHandling = NullValueHandling.Ignore)]
[DataMember]
public string job { get; set; }
/// <summary>
/// Specifies a mood status of user as a color.The field is absent in read commands if it has null value.
/// </summary>
[JsonProperty(NullValueHandling = NullValueHandling.Ignore)]
[DataMember]
public int? mood { get; set; }
/// <summary>
/// Specifies a relationship status of user.The field is absent if it has null value.
/// </summary>
[JsonProperty(NullValueHandling = NullValueHandling.Ignore)]
[DataMember]
public RelationshipStatus? relationshipStatus { get; set; }
/// <summary>
/// Defines a discovery purpose specified by user.The field is absent if it has null value.
/// </summary>
[JsonProperty(NullValueHandling = NullValueHandling.Ignore)]
[DataMember]
public DiscoveryPurpose? discoveryPurpose { get; set; }
/// <summary>
/// Specifies a list of user interests. The field is absent if it has null value.
/// </summary>
[JsonProperty(NullValueHandling = NullValueHandling.Ignore)]
[DataMember]
public UserInterest<InterestCategory?, object>[] interests { get; set; }
/// <summary>
/// Specifies a status of user. The field is absent if it has null value.
/// </summary>
[JsonProperty(NullValueHandling = NullValueHandling.Ignore)]
[DataMember]
public string status { get; set; }
/// <summary>
/// Specifies an availability status of user.
/// </summary>
[JsonConverter(typeof(EnumAttributeConverter<AvailabilityStatus>))]
[DataMember]
public AvailabilityStatus availabilityStatus { get; set; }
/// <summary>
/// Specifies a location of user. The field is absent if location is undefined.
/// </summary>
[JsonProperty(NullValueHandling = NullValueHandling.Ignore)]
[DataMember]
public Location location { get; set; }
/// <summary>
/// Defines if the given user and the requestor interacted previously.
/// </summary>
[JsonProperty(NullValueHandling = NullValueHandling.Ignore)]
[DataMember]
public bool interacted { get; set; }
/// <summary>
/// Defines the status of pending friendship request if it exists.
/// Equals NONE if there is no pending friendship request.
/// Equals PENDING_IN if the given user sent friendship
/// request to the user (requestor) who requests extended
/// information.
/// Equals PENDING_OUT if the requestor sent friendship
/// request to the given request.
/// </summary>
[JsonConverter(typeof(EnumAttributeConverter<FriendshipRequestStatus>))]
[DataMember]
public FriendshipRequestStatus friendshipRequestStatus { get; set; }
/// <summary>
/// Defines if the given user was ignored by the requestor.
/// </summary>
///
[DataMember]
public bool ignored { get; set; }
}