change my technology

WPF, Web applications using ASP.NET and WinForms have one thing in common: .NET framework. If, you know and understand .NET framework and how to use it to build applications. 

 

WPF framework is much similar to WinForms because it is a desktop programming framework. It generates the output in a graphical applications for desktop. The binaries are much similar, the codes and the objects for the programming are much similar in WinForms and WPF. In many ways, they are different also.

 

For more on this, please read:

http://www.wpf-tutorial.com/about-wpf/wpf-vs-winforms/

http://stackoverflow.com/questions/6564795/wpf-vs-winforms-for-net-newbies

 

Now, the ASP.NET web applications are a bit different. To understand that, you need to understand networking also. You need to understand how a client-server application model is implemented. 

 

You may want to learn a bit about programming on these frameworks before you can apply. But typically it would just take a few months to get you started on these frameworks too.