c# – Xamarin.Android JSON.Net serilization在4.2.2设备上失败

我有this issue但是当我升级到Xamarin 3.0时,它变成了以下内容：

06-03 21:17:41.687 E/mono-rt (22071): [ERROR] FATAL UNHANDLED EXCEPTION: System.TimeZoneNotFoundException: Exception of type 'System.TimeZoneNotFoundException' was thrown.
06-03 21:17:41.687 E/mono-rt (22071):   at System.TimeZoneInfo.get_Local () [0x00000] in <filename unknown>:0 
06-03 21:17:41.687 E/mono-rt (22071):   at Newtonsoft.Json.Utilities.DateTimeUtils.GetUtcOffset (DateTime d) [0x00000] in <filename unknown>:0 
06-03 21:17:41.687 E/mono-rt (22071):   at Newtonsoft.Json.Utilities.DateTimeUtils.WriteDateTimeString (System.Char[] chars,Int32 start,DateTime value,Nullable`1 offset,DateTimeKind kind,DateFormatHandling format) [0x00000] in <filename unknown>:0 
06-03 21:17:41.687 E/mono-rt (22071):   at Newtonsoft.Json.JsonTextWriter.WriteValue (DateTime value) [0x00000] in <filename unknown>:0 
06-03 21:17:41.687 E/mono-rt (22071):   at Newtonsoft.Json.JsonWriter.WriteValue (Newtonsoft.Json.JsonWriter writer,PrimitiveTypeCode typeCode,System.Object value) [0x00000] in <filename unknown>:0 
06-03 21:17:41.687 E/mono-rt (22071):   at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializePrimitive (Newtonsoft.Json.JsonWriter writer,System.Object value,Newtonsoft.Json.Serialization.JsonPrimitiveContract contract,Newtonsoft.Json.Serialization.
06-03 21:17:41.695 I/mono-stdout(22071): Executing Command: UpdateRegistration
The program 'Mono' has exited with code 0 (0x0).

编辑这是我试图序列化的DTO.您可以看到构造函数被调用的时间,它将其设置为DateTime.Now.难道这只是假设当地时区？

public class RecordTargetFrequency : BaseCommand,ICommand {
        public Guid TargetId { get; private set; }
        public Guid? LocationId { get; private set; }
        public Guid TherapistId { get; private set; }
        public bool? Increase { get; private set; }
        public DateTime TimeStamp { get; private set; }

        public RecordTargetFrequency(Guid targetId,Guid? locationId,Guid therapistId,bool? increase) {
            TimeStamp = DateTime.Now;
            TargetId = targetId;
            LocationId = locationId;
            TherapistId = therapistId;
            Increase = increase;
        }

        public void Validate() {
            ValidateGuid(TargetId);
            ValidateGuid(TherapistId);
        }
    }

然后我用这一行序列化它：

JsonConvert.SerializeObject(executedCommand);