MEF with ASP.NET - "Hello World!"

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

using System.ComponentModel.Composition;
using System.ComponentModel.Composition.Hosting;



namespace aspnetMEFBasic {
  public partial class aspnetMEFBasic : System.Web.UI.Page {
    //Import our "plugin"
    [Import]
    Class1 c1;

    protected void Page_Load(object sender, EventArgs e) {
      //Step 1:
      //Find the assembly (.dll) that has the stuff we need (i.e. [Export]ed stuff) and put it in our catalog
      DirectoryCatalog catalog = new DirectoryCatalog(System.IO.Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "bin"));

      //Step 2:
      //To do anything with the stuff in the catalog, we need to put into a container (Which has methods to do the magic stuff)
      CompositionContainer container = new CompositionContainer(catalog);

      //Step 3:
      //Now lets do the magic bit - Wiring everything up
      container.ComposeParts(this);

      //Step4:
      //Lets see if it works
      div1.InnerText = c1.s1;

    }
  }
}