C#

public class Student
{
    public string Name { get; set; }
    public IList<Course> Courses { get; set; }
}

public class Course
{
    public string Name { get; set; }
    public IList<Student> Students { get; set; }
}

using System;
using System.Windows.Forms;

namespace WindowsFormsControlLibrary
{
	public partial class ListPicker : DomainUpDown
	{
		public EventHandler ModifiedChanged;

		public ListPicker()
		{
			InitializeComponent();

			// Register our TextChanged hander.
			TextChanged += new EventHandler(ListPicker_TextChanged);

			Modified = false;
		}

		public bool Modified { get; set; }

		public void ListPicker_TextChanged(object sender, EventArgs args)
		{
			Modified = true;
			OnModifiedChanged();
		}

		protected void OnModifiedChanged()
		{
			if (ModifiedChanged != null)
			{
				ModifiedChanged(this, null);
			}				
		}
	}
}

var x = ctl.GetType().GetEvents();
var modifiedChangedEventInfo = ctl.GetType().GetEvent("ModifiedChanged");

   private void CreateAppPoolIIS7()
        {
            using (ServerManager serverManager = new ServerManager())
            {
                string appPoolName = this.Context.Parameters["APPPOOL"];
                ApplicationPool newPool;
                newPool = serverManager.ApplicationPools.FirstOrDefault(x => x.Name == appPoolName);
                if (newPool == null)
                    newPool = serverManager.ApplicationPools.Add(appPoolName);
                newPool.ManagedRuntimeVersion = "v4.0";
                newPool.ManagedPipelineMode = ManagedPipelineMode.Classic;
                serverManager.CommitChanges();
            }
        }
        private void AssignIIS7AppPoolToVirDir()
        {
            using (ServerManager serverManager = new ServerManager())
            {
                // Find Default Website
                Microsoft.Web.Administration.Application newApp = null;
                string appPoolName = this.Context.Parameters["APPPOOL"];
// Get the Root website
                Site site = serverManager.Sites.First(s => s.Id == 1);
                string installpath = this.Context.Parameters["INSTALLDIR"];
                installpath = installpath.TrimEnd('\\');
//Get the name of the virtual directory
                string virdirname = "/" + installpath.Substring(installpath.LastIndexOf('\\') + 1);

                newApp = site.Applications.FirstOrDefault(x => x.Path == virdirname);
                if (newApp != null)
                {
                    newApp.ApplicationPoolName = appPoolName;
                    serverManager.CommitChanges();
                }
                else
                {
                    MessageBox.Show("Website not found");
                }
           }
        }

 public override void Install(IDictionary stateSaver)
        {
         .......
CreateAppPoolIIS7();
AssignIIS7AppPoolToVirDir();