using System;
using System.Linq;
using System.Collections.Generic;
using System.Collections.Concurrent;
using System.Reflection;
using System.Linq.Expressions;
using System.Threading;
using System.Threading.Tasks;

var registry = new Dictionary<string, Func<IMessage>>(StringComparer.Ordinal) { ["rune"] = () => new RuneMessage() };
IMessage direct = registry["rune"]();
IMessage reflected = Create(typeof(RuneMessage));
if (reflected.Text != direct.Text) throw new InvalidOperationException("Activation disagreed");
Console.WriteLine($"message:{direct.Text}");
Console.WriteLine($"missing:{registry.TryGetValue("other", out _)}");
static IMessage Create([System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembers(System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.PublicParameterlessConstructor)] Type type)
    => (IMessage)Activator.CreateInstance(type)!;
public interface IMessage { string Text { get; } }
public sealed class RuneMessage : IMessage { public RuneMessage() { } public string Text => "rune"; }