Further reading
You can find more information about materials discussed in this chapter at these URLs:
- Inheritance in C#: https://learn.microsoft.com/en-us/dotnet/csharp/fundamentals/tutorials/inheritance
- Sealed Modifier: https://learn.microsoft.com/en-us/dotnet/csharp/language-reference/keywords/sealed
- IEquatable<T>: https://learn.microsoft.com/en-us/dotnet/api/system.iequatable-1