I hope I will try it out a real world project example.
Could you please recommend a suitable textbook?

Thanks

That depends on your level of expertise at this point. You might want to delve deeper into your language of choice with one of the language specific books, or you could go to one of the ASP.NET 2.0 Professional books. Most Wrox books have a "knowledge roadmap" on the back that highlights where the books it's on fits in the path of knowledge. Follow the arrows to find where else to go.

-Peter

I just found there are a roadmap on the back.
Thanks.

Does it mean the books side by side are in the same level?
For ex.
"Beginning ASP.NET 2.0 with C#","ASP.NET 2.0 instantresults" and "ASP.NET 2.0 Web Site Programming" are for beginners.

"Professional Web Parts and Custom Controls with ASP.NET 2.0",
"Professional ASP.NET 2.0" and "Professional ASP.NET 2.0 XML" are for middle level programmers.

Is that true?

That sounds like a typical learning flow. Many of the beginner books fall on the same level because they are different based on your educational path and language choices. I.e. there are different books for VB.NET and C# and likewise different paths for web site development versus desktop development. There is a fair amount of cross over between many subjects because of the nature of the .NET framework. You can work with certain areas of the technology in any application type such as ADO.NET, XML or consuming web services.

-Peter

You can go for "ASP.NET 2.0 Instant Results" as this book gives good knowledge of about 10 projects.
Also,if you want to get professional expertise in ASP.NET 2.0 Development,then you can go for "Professional ASP.NET 2.0 Special Edition".