Take advantage of extension methods to add functionality to existing types without needing to modify or derive from those original types. In the C# programming language, extension methods enable you ...

Take advantage of default interface methods in C# 8.0 to add new methods to an interface without breaking existing implementations. One of the new and interesting features in C# 8.0 is the support for ...

This is a little more informative, but you still can't tell what's really going on, because it's magic. If you could peer inside the My.Forms feature, you might find Visual Basic adding parallel form ...