Registering open generic decorators for typed implementations at Windsor Castle

While trying to get Windsor to wrap an implementation with a random number of decorators, I came across the following:

I have 3 decorators and an implementation using the same interface.

if you run this code windsor resolves icommandhandler<stringcommand>

like implementation

, which is the expected behavior as far as I can tell, because a typed implementation cannot be registered with public typed decorators.

However, if you uncomment the line container.Register(Component.For<ICommandHandler<stringCommand>>().ImplementedBy<Decorator1<stringCommand>>());

, all three decorators will be used for resolution implementation

, which is the desired result (sort :).

class Program
{
    static void Main(string[] args)
    {
        var container = new WindsorContainer();

        container.Register(Component.For(typeof(ICommandHandler<>)).ImplementedBy(typeof(Decorator1<>)));
        container.Register(Component.For(typeof(ICommandHandler<>)).ImplementedBy(typeof(Decorator2<>)));
        container.Register(Component.For(typeof(ICommandHandler<>)).ImplementedBy(typeof(Decorator3<>)));

        //uncomment the line below and watch the magic happen
        //container.Register(Component.For<ICommandHandler<stringCommand>>().ImplementedBy<Decorator1<stringCommand>>());
        container.Register(Component.For<ICommandHandler<stringCommand>>().ImplementedBy<implementation>());

        var stringCommandHandler = container.Resolve<ICommandHandler<stringCommand>>();
        var command = new stringCommand();
        stringCommandHandler.Handle(command);

        Console.WriteLine(command.s);
        Console.ReadKey();
    }
}

public interface ICommandHandler<T>
{
    void Handle(T t);
}

public class stringCommand
{
    public string s { get; set; }
}

public abstract class Decorator<T> : ICommandHandler<T>
{
    public abstract void Handle(T t);
};

public class Decorator1<T> : Decorator<T>
    where T : stringCommand
{
    private ICommandHandler<T> _handler;
    public Decorator1(ICommandHandler<T> handler)
    {
        _handler = handler;
    }

    public override void Handle(T t)
    {
        t.s += "Decorator1;";
        _handler.Handle(t);
    }
}

public class Decorator2<T> : Decorator<T>
    where T : stringCommand
{
    private ICommandHandler<T> _handler;
    public Decorator2(ICommandHandler<T> handler)
    {
        _handler = handler;
    }

    public override void Handle(T t)
    {
        t.s += "Decorator2;";
        _handler.Handle(t);
    }
}
public class Decorator3<T> : Decorator<T>
    where T : stringCommand
{
    private ICommandHandler<T> _handler;
    public Decorator3(ICommandHandler<T> handler)
    {
        _handler = handler;
    }

    public override void Handle(T t)
    {
        t.s += "Decorator3;";
        _handler.Handle(t);
    }
}

public class implementation : ICommandHandler<stringCommand>
{
    public void Handle(stringCommand t)
    {
        t.s += "implementation;";
    }
}

      

        
        
        
      

    

Why exactly is this happening, is it a Windsor feature that I am not aware of? Is there another way to achieve the same effect? (without thinking)