dotnet add package Microsoft.Orleans.Serialization.MessagePack

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

var builder = Host.CreateApplicationBuilder(args)
    .UseOrleans(siloBuilder =>
    {
        siloBuilder
            .UseLocalhostClustering()
            // Configure MessagePack as a serializer
            .AddSerializer(serializerBuilder => serializerBuilder.AddMessagePackSerializer());
    });

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

using Orleans;
using Orleans.Serialization.Cloning;
using Orleans.Serialization.Codecs;
using Orleans.Serialization.Configuration;
using Orleans.Serialization.Serializers;
using MessagePack;
namespace ExampleGrains;

// Define a class with MessagePack attributes
[MessagePackObject]
public class MyMessagePackClass
{
    [Key(0)]
    public string Name { get; set; }
    
    [Key(1)]
    public int Age { get; set; }
    
    [Key(2)]
    public List<string> Tags { get; set; }
}

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

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

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

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