class MyTextBox:TextBox
{
    Object tag;

     public MyTextBox():base(){}
     public Object Tag
    {
         get {return tag;}
         set{ tag=value;}
     }
}/**********Comments***************************/
We trust you have received the usual lecture from the local System Administrator. It usually boils down to these three things:
 #1) Respect the privacy of others.
#2) Think before you type.
#3) With great power comes great responsibility.