using System;

using ProtoBuf;

using System.Collections.Concurrent;

using System.IO;

public class Program

{

    public static void Main()

    {

        ConcurrentDictionary<string, int> dict1 = new();

        dict1.TryAdd("A", 1);

        dict1.TryAdd("B", 2);

        ConcurrentDictionary<string, int> dict2 = new();

        dict2.TryAdd("C", 3);

        dict2.TryAdd("D", 4);

        Console.WriteLine($"dict1: {String.Join(", ", dict1)}");

        Console.WriteLine($"dict2: {String.Join(", ", dict2)}");

        MemoryStream stream = new();

        Serializer.Serialize(stream, (dict1, dict2));

        Console.WriteLine();

​

        stream.Position = 0;

        var (copy1, copy2) = Serializer

            .Deserialize<(ConcurrentDictionary<string, int>, ConcurrentDictionary<string, int>)>(stream);

        Console.WriteLine($"copy1: {String.Join(", ", copy1)}");

        Console.WriteLine($"copy2: {String.Join(", ", copy2)}");

    }

}

​