Having trouble accessing data within a template of a custom server control

I just began to look into custom server controls a couple days ago, and while I'm happy with my progress overall, I'm stuck on an issue.


Conditional.cs
using System.ComponentModel;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace ServerControls
{
    [DefaultProperty("Selector")]
    [ToolboxData("<{0}:Conditional runat=server></{0}:Conditional>")]
    public class Conditional : WebControl
    {
        #region TrueTemplate
        [Category("Data")]
        [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
        [PersistenceMode(PersistenceMode.InnerProperty)]
        public ITemplate TrueTe ...