Custom Route Builder for Nancy

gistfile1.cs

public class NancyModule : NancyModule<RouteBuilder>
{
}

public class NancyModule<T> where T : RouteBuilder
{
    private static ConcurrentDictionary<Type, Func<object>> CompiledRouteBuilders = new ConcurrentDictionary<Type, Func<object>>();

    public virtual T Get
    {
        get
        {
            return CreateRouteBuilder("GET");
        }
    }

    public virtual T Post
    {
        get
        {
            return CreateRouteBuilder("POST");
        }
    }

    private T CreateRouteBuilder(string verb)
    {
        var currentType = typeof(T);

        if (!CompiledRouteBuilders.ContainsKey(currentType))
        {
            var compiled = Expression.Lambda<Func<object>>(Expression.New(currentType)).Compile();
            CompiledRouteBuilders.TryAdd(currentType, compiled);
        }

        var builder = (T) CompiledRouteBuilders[currentType]();

        builder.Verb = verb;
        builder.Module = this as NancyModule<RouteBuilder>;

        return builder;
    }
}

public class RouteBuilder
{
    public virtual NancyModule<RouteBuilder> Module { get; set; }
    public virtual string Verb { get; set; }
    
    public Func<dynamic, dynamic> this[string path]
    {
        set 
        { 
            this.AddRoute(path, null, value);
        }
    }
}

gistfile2.txt

public class MyBaseModule : NancyModule<MyRouteBuilder>
{
    public MyBaseModule()
    {
        Get["/", "/{id}" = _ =>
        {
            ...
        }
    }
    
    public T Debug
    {
      return { new MyRouteBuilder("Get"); }
    }
}

public class MyRouteBuilder : RouteBuilder
{
    public Func<dynamic, dynamic> this[string[] paths]
    {
        set 
        { 
            // apply route implementation to all paths
            foreach(var path in paths)
            {
                this.AddRoute(path, null, value); 
            }
        }
    }
    
    public Func<dynamic, dynamic> this[string path, string routeName]
    {
        set 
        { 
            //Add route name to header response
            this.AddRoute(path, null, value);
        }
    }
}