Sub-pipeline example

subpipeline.cs

if (routeData.Pipeline.Any())
{
    IAppBuilder branch = builder.New();
    foreach (var middleware in routeData.Pipeline)
    {
        branch.Use(middleware);
    }

    branch.Use(typeof(RedirectMiddleware), this.next);

    var continuation = (Func<IDictionary<string, object>, Task>)branch.Build(typeof(Func<IDictionary<string, object>, Task>));
    await continuation(environment);
}
else
{
    await this.next(environment);    
}