Custom composite control [2]-raises cache events

Using System;
Using System. Web. UI;
Using System. Web. UI. webcontrols;
Using System. componentmodel;

Namespace Csmathcontrol
{
///   <Summary>
/// Cache events
///   </Summary>
[Defaultproperty ( " Text " ),
Toolboxdata ( " <{0}: rendertext runat = Server> </{0}: rendertext> " )]
Public   Class Rendertext: system. Web. UI. webcontrols. webcontrol
{

[Bindable ( True ),
Category ( " Appearance " ),
Defaultvalue ( "" )]
Public   String Text
{
Get
{
If (Viewstate [ " Text " ] ! = Null )
Return Viewstate [ " Text " ]. Tostring ();
Else
Return   Null ;
}
Set
{
Viewstate [ " Text " ] = Value;
Onchange (eventargs. Empty );
}
}
///   <Summary>  
/// This control is displayed to the specified output parameter.
///   </Summary>
///   <Param name = "output"> HTML writer to write </Param>
Protected   Override   Void Render (htmltextwriter output)
{
// Output. Write (text );
Output. addattribute ( " Value " , This . Text );
Output. renderbegintag ( " Input " );
Output. renderendtag ();
}
// --------------- Event --------------------
///
Public   Event Eventhandler change;
Protected   Virtual   Void Onchange (eventargs E)
{
If (Change ! = Null )
Change ( This , E );
}
// ----------------------------------
}
}