var factory = new CompositeHandlerFactory();
var handler = factory.Create(new HandlerDelegate<int, string>[] { 
    (context, next) => context == 2 ? "We stop on the number 2" : next(),
    (context, next) => context < 10 ? $"Doubled value {context * 2}": next()
},
cfg => cfg.WithDefaultHandler(context => $"Reached the end with {context}"));

Console.WriteLine(handler(1)); // Returns "Doubled value 2" 
Console.WriteLine(handler(2)); // Returns "We stop on the number 2"
Console.WriteLine(handler(12)); // Returns "Reached the end with 12"