Nullreference exception while running project in Genymotion, but not in Android Sdk Emulator

Hi,

I was running my project in Android Sdk emulator, but just for more convenience, for the past two days i am running the project in Genymotion. My project loaded successfully in Genymotion, but in the below line its throwing null reference exception

JsonSerializerSettings microsoftDateFormatSettings = new JsonSerializerSettings
            {
                DateFormatHandling = DateFormatHandling.MicrosoftDateFormat
            };

            data = JsonConvert.SerializeObject (new { moduleLastSyncTime = Datetime.MinValue, module = "syncModule", clientItems = syncItems}, microsoftDateFormatSettings);

Below exception

Instance    {System.NullReferenceException: Object reference not set to an instance of an object
  at Newtonsoft.Json.Utilities.DateTimeUtils.GetUtcOffset (DateTime d) [0x00000] in <filename unknown>:0 
  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 
  at Newtonsoft.Json.JsonTextWriter.WriteValue (DateTime value) [0x00000] in <filename unknown>:0 
  at Newtonsoft.Json.JsonWriter.WriteValue (Newtonsoft.Json.JsonWriter writer, PrimitiveTypeCode typeCode, System.Object value) [0x00000] in <filename unknown>:0 
  at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializePrimitive (Newtonsoft.Json.JsonWriter writer, System.Object value, Newtonsoft.Json.Serialization.JsonPrimitiveContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerProperty) [0x00000] in <filename unknown>:0 
  at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue (Newtonsoft.Json.JsonWriter writer, System.Object value, Newtonsoft.Json.Serialization.JsonContract valueContract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerProperty) [0x00000] in <filename unknown>:0 
  at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeObject (Newtonsoft.Json.JsonWriter writer, System.Object value, Newtonsoft.Json.Serialization.JsonObjectContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract collectionContract, Newtonsoft.Json.Serialization.JsonProperty containerProperty) [0x00000] in <filename unknown>:0 }    System.NullReferenceException

The same code working in Android Sdk emulator, but why its not working in Genymotion? I don't have any idea, nothing is null, please someone help me

Thanks...