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

using System;
using System.Net;
using System.Windows;
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.ComponentModel.Composition;
using System.Collections.Generic;
using Wex.Lib.Interactions;

namespace Wex.Lib.Composition
{
    [MetadataAttribute]
    [AttributeUsage(AttributeTargets.Method, AllowMultiple = false)]
    public class ObservableExportAttribute : ExportAttribute
    {
        public ObservableExportAttribute() : base(typeof(Func<object, IObservable<EventResult>>)) { }
        public string ExportName { get; set; }
    }

    
}