This list is incomplete...

• Autofac-Examples
  Dependency Injection framework
• ClassesQuickstart
  An introduction to classes and interfaces
• ComplexNumbers
• DataStructures
  linked list and tree examples.
• DI-Bernasconi
  Code accompanying the video by Claudio Bernasconi.
• DI-Webcast
  Code accompanying the video by Miguel Castro.
• DependencyInjection
  The code from the session — HelloWorld.
• DesignPatterns
  Further examples of the GoF design patterns.
• Functional-Programming
  A series of functional programming examples.
• InputOutput
  A series of input/output examples.
• Java - examples
• LINQ
  examples
• Microsoft-try-samples
  Code from the original set of "try dotnet" articles.
• Overloading
  Examples illustrating the use of virtual and override.
• TestingExample
MSUnit examples
• Threads
  Some examples on the basic constructs of threading in C# (although there is a BackgroundWorker example).
• help-sessions-*
  Code from the online help sessions.
• lecture-*
  Code from the online lecture sessions.
• linkedin-learning-design-patterns-examples
  The sample code from the series of three C# design patten "courses" by Reynald Adolphe
• prog-cs-8-examples
  Source code from "Programming C# 8.0" by Ian Griffiths
  Published by O'Reilly Media, Inc., 2019
• ...

I forget where most of these examples came from (unless they are credited above) so I'll just list some of the people I've collaborated with or who have provided sample code; apologies to anyone I've forgotten.

• Hanspeter Mössenböck, University of Linz