C# and .NET: Classes, Polymorphism, and C#'s "is" keyword

Recording of my C# fundamentals course at the HTBLA Leonding.
Course GitHub Repo: github.com/rstropek/2023-24-2nd/
00:00:00 Intro, welcome
00:00:59 Recap: (Abstract) Base classes
00:03:40 Abstract properties
00:06:27 Abstract methods
00:07:54 Virtual methods
00:10:14 The "is" keyword
00:14:11 The "Object" class
00:16:31 Polymorphism
00:23:48 Homework/exercise