Support for .NET 6 or 7

[MagnusMouritzen]

Greetings
dotSpace does not seem to work on .NET 6 or 7, which are the officially supported versions. Specifically, networking does not work.
The example found here
https://github.com/pSpaces/dotSpace/wiki/RemoteSpace-Class
does not work (after fixing the unrelated FIFO and remotespace errors).
This example also does not work.
https://github.com/pSpaces/dotSpace-Examples/blob/master/Example5/Program.cs
I believe it also was the cause of this issue.
#11

I have tested the following code on .NET 6.0 and .NET 4.8. In the former case, an error occurs when getting the tuple from the client. The client fails with BAD_RESPONSE and the server fails with BAD_REQUEST.

using dotSpace.Objects.Space;
using dotSpace.Objects.Network;

class ServerProgram
{
    static void Main(string[] args)
    {
        var repository = new SpaceRepository();
        repository.AddGate("tcp://127.0.0.1:9001?CONN");
        repository.AddSpace("dtu", new SequentialSpace());
        repository.Put("dtu", "Hello world!");
        Console.Read();
    }
}

using dotSpace.Objects.Network;

class ClientProgram
{
    static void Main(string[] args)
    {
        var remotespace = new RemoteSpace("tcp://127.0.0.1:9001/dtu?CONN");
        var tuple = remotespace.Get(typeof(string));
        Console.WriteLine(tuple);
        Console.Read();
    }
}

If possible, it would be great to get a quick solution so the library can be used for projects this January.