using System;

using System.Text.Json;

using Newtonsoft.Json;

using MessagePack;

using ProtoBuf;

using System.IO;

public class Program

{

    public static void Main()

    {

        var person = new Person { Name = "John Doe", Age = 30 };

        var personProto = new PersonProto { Name = "John Doe", Age = 30 };

​

        // MessagePack

        byte[] messagePackBytes = MessagePackSerializer.Serialize(person);

        Console.WriteLine($"MessagePack Size: {messagePackBytes.Length} bytes");

​

        // Protobuf

        using var protoStream = new MemoryStream();

        Serializer.Serialize(protoStream, personProto);

        byte[] protoBytes = protoStream.ToArray();

        Console.WriteLine($"Protobuf Size: {protoBytes.Length} bytes");

​

        // System.Text.Json

        string jsonText = System.Text.Json.JsonSerializer.Serialize(person);

        byte[] jsonBytes = System.Text.Encoding.UTF8.GetBytes(jsonText);

        Console.WriteLine($"System.Text.Json Size: {jsonBytes.Length} bytes");

​

        // Newtonsoft.Json

        string newtonJson = JsonConvert.SerializeObject(person);

        byte[] newtonBytes = System.Text.Encoding.UTF8.GetBytes(newtonJson);

        Console.WriteLine($"Newtonsoft.Json Size: {newtonBytes.Length} bytes");

    }

}

​

[ProtoContract]

public class PersonProto

{

    [ProtoMember(1)]

    public string Name { get; set; }

​

    [ProtoMember(2)]

    public int Age { get; set; }

}

​

// Normal class for Newtonsoft, System.Text.Json, and MessagePack

[MessagePackObject] // MessagePack attribute

public class Person

{

    [Key(0)]

    public string Name { get; set; }

​

    [Key(1)]

    public int Age { get; set; }

}