using System;

using Newtonsoft.Json;

using Newtonsoft.Json.Converters;

using Newtonsoft.Json.Serialization;

using System.Reflection;

public class Program

{

    public class MyProtobufObject

    {

        public Google.Protobuf.WellKnownTypes.Timestamp openingDatetime {get;set;}

    }

    public class TimeStampContractResolver : DefaultContractResolver

    {

        protected override JsonProperty CreateProperty(MemberInfo member, MemberSerialization memberSerialization)

        {

            var property = base.CreateProperty(member, memberSerialization);

​

            if (property.PropertyType == typeof(DateTime))

            {

                property.Converter = new TimeStampConverter();

            }

​

            return property;

        }

​

        public class TimeStampConverter : DateTimeConverterBase

        {

            public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)

            {

                DateTime date = DateTime.Parse(reader.Value.ToString());

                return Google.Protobuf.WellKnownTypes.Timestamp.FromDateTime(date).ToString();

            }

​

            public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)

            {

                writer.WriteValue(((Google.Protobuf.WellKnownTypes.Timestamp)value).ToString());

            }

        }

    }

    public static void Main()

    {

        string sDate = Google.Protobuf.WellKnownTypes.Timestamp.FromDateTime(DateTime.UtcNow).ToString();

        Console.WriteLine(sDate);

        string myJsonBodyRequest = "{\"openingDatetime\":"+sDate+"}";

        Console.WriteLine(myJsonBodyRequest);

        MyProtobufObject myObjectWithConverter = JsonConvert.DeserializeObject<MyProtobufObject>(myJsonBodyRequest, new JsonSerializer()

            {

                ContractResolver = new TimeStampContractResolver(),

            });

        MyProtobufObject myObjectWithoutConverter = JsonConvert.DeserializeObject<MyProtobufObject>(myJsonBodyRequest);

    }

}