C# Language Overview (Part II) - Creating and Using Objects, Exceptions, Strings, Generics, Collections, Attributes
Telerik Software Academy: http://academy.telerik.com/school-academy/meetings/details/2012/01/06/desktop-applications-csharp-databases
The website and all video materials are in Bulgarian.
Creating and Using Objects
Strings and Text Processing
Clipping is a handy way to collect important slides you want to go back to later.