[Solved] How to extend AJAX RadMenu control under VS2008?

[Han]

Hi, I have upgraded my radcontrols to asp .net AJAX Q3 2008 package. This morning, I decided to upgrade my old custom menu navigation control based on asp .net Q2 radmenu to asp .net AJAX control using this new AJAX package.
The problem raised when I tried to extend this radmenu ajax control. 

I created new AJAX server control under VS2008, then I changed this signature as follows

public

 

class ServerControl1 : RadMenu,IScriptControl
{}

After I compiled this, it throws me an exception that a xml reference is needed. After I added the reference of System.Xml, the error was gone. Unfortunately when I tried to drag this control on a page, another formatetc error came up.

I wonder how I can extend AJAX radcontrols under VS2008 so that I can use this customize control throughout web applications. Can you provides me some ideas or some other specific examples?

[Han]

I have fixed the problem. Thanks