Liskov Substitution Princple Common Smells

• Method throws [[NotSupportedException]]
• Empty or [[degenerative implementation]]
• [[Downcast]]s

Tips¶

• Liskov Substitution Principle is often the result of Open-Closed Principle and Interface Segregation Principle violations

• If two [[class]]es share some logic and they are not substitutable

  • Create new [[base class]]
  • Inherit those two classes from a base class
  • Ensure that they are substitutable with the new base class