Remove need to pass Actor type string when instantiating actors with dotnet sdk and actor source generator

gistfile1.txt

// requires that you're already using the actor source generator package 

public static class TypedActorProxyFactory
{
    private static readonly FrozenDictionary<Type, string> Map;

    static TypedActorProxyFactory()
    {
        Map = (from Assembly e in AppDomain.CurrentDomain.GetAssemblies()
               where e.FullName is not null && !e.FullName.StartsWith("System.") // skip dynamic and coreclr assemblies
               from t in e.GetTypes()
               where t.IsClass &&
                    typeof(IActor).IsAssignableFrom(t) &&
                    !typeof(Actor).IsAssignableFrom(t) && // exclude actor impl             
                    t.Name.EndsWith("Client") // isolate typed client
               select new
               {
                   Client = t,
                   Metadata = new
                   {
                       ActorTypeString = t.Name[..t.Name.LastIndexOf("Client", StringComparison.Ordinal)],
                       Interfaces = t.GetInterfaces().Where(i => typeof(IActor).IsAssignableFrom(i)) // not used (yet?)
                   }
               })
               .ToDictionary(x => x.Client, x => x.Metadata.ActorTypeString)
               .ToFrozenDictionary();
    }

    public static TActorClient Create<TActorClient>(ActorId actorId) where TActorClient : class, IActor
    {
        if (typeof(Actor).IsAssignableFrom(typeof(TActorClient)))
        {
            throw new InvalidOperationException("Cannot create an actor client for an actor implementation. " +
                "Please pass the source generated client as TActorClient.");
        }

        var proxy = ActorProxy.Create(actorId, Map[typeof(TActorClient)]);
        return (TActorClient?)Activator.CreateInstance(typeof(TActorClient), proxy) ?? throw new InvalidOperationException();
    }
}