I regularly do C# sessions and trainings. I use this sample to demonstrate the following topics:

• Scenario-Driven Development (SDD)
• C# Coding Guidelines and Framework Design Guidelines
• Visual Studio Code Analysis and StyleCop
• Code Contracts
• Basics of parallel programming with Task Parallel Library (TPL)
• Visual Studio Unit Testing
• C# code documentation, Sandcastle Helpfile Builder (SHFB), and Ghostdoc
• Various C# language topics like:
  • IDisposable
  • IEnumerable
  • Enumerator blocks
  • Exception handling
  • Indexer
  • Operator overloading
  • Functional programming with lambdas

• Visual Studio 2013
• Sandcastle Helpfile Builder
• Code contracts