C# generic handler discovery and registration/dispatch

GenericHandler.cs

// types
public interface IHandleForwarder
{
    object ForwardToHandle(object input);
}

public abstract class AbstractMessageHandler<TIn,TOut> : IHandleForwarder
{
    public abstract TOut Handle(TIn input);

    object IHandleForwarder.ForwardToHandle(object input)
    {
        return Handle((TIn)input);
    }
}

// setup
var handlers = from type in typeof(Program).Assembly.GetTypes()
    where type.IsGenericType
    where typeof(AbstractMessageHandler<,>).IsAssignableFrom(type.GetGenericTypeDefinition())
    select type;

var handlersMap = new Dictionary<Type, Func<object, object>>();
foreach (var handler in handlers)
{
    var input = handler.GetGenericArguments()[0];
    var handleForwarder = (IHandleForwarder)Activator.CreateInstance(handler);
    handlersMap[input] = handleForwarder.ForwardToHandle;
}

// handling a message:
var reply = handlersMap[msg.GetType()](msg);