using System;

using System.Reflection;

using Newtonsoft.Json;

using Newtonsoft.Json.Serialization;

public class Program

{

    public static void Main()

    {

        string json = @"

            {

              ""Message1"": ""A message"",

              ""MyInt"": 1

            }";

        TryDeserialize(json);

        Console.WriteLine("------------");

​

        string json1 = @"

            {

              ""Message1"": ""A message"",

              ""MyNullableInt"": 1

            }";

        TryDeserialize(json1);

    }

​

    private static MyParameters TryDeserialize(string json)

    {

        try

        {

            JsonSerializerSettings settings = new JsonSerializerSettings();

            settings.ContractResolver = new NonNullablePropertiesRequiredResolver();

            MyParameters parms = JsonConvert.DeserializeObject<MyParameters>(json, settings);

            Console.WriteLine("Message1: " + (parms.Message1 ?? "(null)"));

            Console.WriteLine("Message2: " + (parms.Message2 ?? "(null)"));

            Console.WriteLine("MyInt: " + parms.MyInt);

            Console.WriteLine("MyNullableInt: " + (parms.MyNullableInt.HasValue ? parms.MyNullableInt.Value.ToString() : "(null)"));

            return parms;

        }

        catch (JsonException ex)

        {

            Console.WriteLine(ex.Message);

            return null;

        }

    }

}

​

public class MyParameters

{

    public string Message1 { get; set; }

    public string Message2 { get; set; }

    public int MyInt { get; set; }

    public int? MyNullableInt { get; set; }

}

​

class NonNullablePropertiesRequiredResolver : DefaultContractResolver

{

    protected override JsonProperty CreateProperty(MemberInfo member, MemberSerialization memberSerialization)

    {

        JsonProperty prop = base.CreateProperty(member, memberSerialization);

        Type propType = prop.PropertyType;

        if (propType.IsValueType && !(propType.IsGenericType && propType.GetGenericTypeDefinition() == typeof(Nullable<>)))

        {

            prop.Required = Required.Always;

        }

        return prop;

    }

}

​