dotnet add package Microsoft.Orleans.Serialization.NewtonsoftJson

using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Orleans.Hosting;
using Orleans.Serialization;

var builder = Host.CreateApplicationBuilder(args)
    .UseOrleans(siloBuilder =>
    {
        siloBuilder
            .UseLocalhostClustering()
            // Configure Newtonsoft.Json as a serializer
            .AddSerializer(serializerBuilder => serializerBuilder.AddNewtonsoftJsonSerializer(type => type.Namespace.StartsWith("ExampleGrains")));
    });

// Run the host
await builder.RunAsync();

using Orleans;
using Newtonsoft.Json;
namespace ExampleGrains;

// Define a class with Newtonsoft.Json attributes
public class MyJsonClass
{
    [JsonProperty("full_name")]
    public string Name { get; set; }
    
    [JsonProperty("age")]
    public int Age { get; set; }
    
    [JsonProperty("tags")]
    public List<string> Tags { get; set; }
    
    [JsonIgnore]
    public string SecretData { get; set; }
}

// You can use it directly in your grain interfaces and implementation
public interface IMyGrain : IGrainWithStringKey
{
    Task<MyJsonClass> GetData();
    Task SetData(MyJsonClass data);
}

public class MyGrain : Grain, IMyGrain
{
    private MyJsonClass _data;

    public Task<MyJsonClass> GetData()
    {
        return Task.FromResult(_data);
    }

    public Task SetData(MyJsonClass data)
    {
        _data = data;
        return Task.CompletedTask;
    }
}