// Attach the ConstructorNeedsTagAttribute to the custom Simple
  // class, which is derived from the WebControl class. This 
  // instance of the ConstructorNeedsTagAttribute class sets the
  // NeedsTag property to true.
  [ConstructorNeedsTagAttribute(true)]
  [AspNetHostingPermission(SecurityAction.Demand, 
     Level=AspNetHostingPermissionLevel.Minimal)]
  public sealed class Simple : WebControl 
  {
     private String NameTag = "";

     public Simple(String tag)
      {
            this.NameTag = tag;
      }         

      private String   UserMessage = null;

      // Create a property named ControlValue.
      public String ControlValue 
      {
         get 
         {
            return UserMessage;
         }
         set 
         {
            UserMessage = value;
         }
      }                

      protected override void Render(HtmlTextWriter output) 
      {
         output.Write("Testing the ConstructorNeedsTagAttribute Class.");
      }
}