WPF Extensibility Hacks or WEX - Includes EventTrigger, ReactiveTrigger, InvokeMethodAction, InvokeCommandAction etc.

using System;
using System.Net;
using System.Windows;
using System.Linq;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.Collections.Generic;
using System.ComponentModel.Composition;
using System.ComponentModel.Composition.Hosting;
using System.ComponentModel.Composition.Primitives;
using Wex.Lib.Interactions;

namespace Wex.Lib.Composition
{
    /// <summary>
    /// To compose the available behaviours and triggers, so that they can be imported later
    /// </summary>
    public class WexPartComposer
    {

        static WexPartComposer Instance { get; set; }

        [ImportMany]
        public Lazy<Func<object, IObservable<EventResult>>, IExportName>[] Senders { get; set; }

        private WexPartComposer() { }

        static WexPartComposer()
        {
            Compose();
        }

        /// <summary>
        /// Resolve an exported function
        /// </summary>
        /// <param name="name"></param>
        /// <returns></returns>
        public static Func<object, IObservable<EventResult>> Resolve(string name)
        {
            var senders = Instance.Senders;

            if (senders == null) throw new InvalidOperationException("Part composer not initialized");
            try
            {
                return senders.FirstOrDefault(s => s.Metadata.ExportName == name).Value;
            }
            catch (Exception ex)
            {
                return null;
            }
        }


        /// <summary>
        /// Compose .. 
        /// </summary>
        public static void Compose(ComposablePartCatalog c)
        {
            Instance = new WexPartComposer(); 
            var catalog = new AggregateCatalog();
            catalog.Catalogs.Add(c);
            var container = new CompositionContainer(catalog);
            container.ComposeParts(Instance);
            
        }

        internal static void Compose()
        {
            Compose(new AssemblyCatalog(System.Reflection.Assembly.GetExecutingAssembly()));
        }


        



    }
}