How to create tabbed interface in asp.net?

I want create the tabbed interface in asp.net, for this i have searching in internet at finally i found a link below i paste that link please verify that.

i am using this link to create tabbed items but this showing some errors like namespace are not found. Please help me where i can change to rectify this error.

Hope you can understand my problem please...

http://weblogs.asp.net/alessandro/archive/2008/01/05/tabmenu-missing-in-the-asp-net-toolbox-not-anymore.aspx

You can look at the ajax toolkit: http://www.asp.net/ajax/ajaxcontroltoolkit/samples/tabs/tabs.aspx

While I recomend to take a look at a jquery solution if you know jquery well

And this is a way to create tabs without ajax or jquery: A Simple ASP.NET Tab Control Using the MultiView control

In addition to Amr ElGarhy I'd like to add jQuery UI .

You can also try free ASP.NET Controls with Full AJAX Support it works fine,