What is the fine-grained topic of the following text: Since 2003, he has been working with C#, Visual Basic .NET, AJAX, ASP.NET with MVC, Web Services, Windows Forms, WPF with MVVM, GDI+, Crystal Reports, Reporting Services, SQL Server 2005, Oracle and Visual Studio 2005/2008/2010. Only return the topic.
Programming languages and technologies experience