Why Would I Ever Need to Use C# Nested Classes [duplicate]

by

A pattern that I particularly like is to combine nested classes with the factory pattern:

public abstract class BankAccount
{
  private BankAccount() {} // prevent third-party subclassing.
  private sealed class SavingsAccount : BankAccount { ... }
  private sealed class ChequingAccount : BankAccount { ... }
  public static BankAccount MakeSavingAccount() { ... }
  public static BankAccount MakeChequingAccount() { ... }
}

By nesting the classes like this, I make it impossible for third parties to create their own subclasses. I have complete control over all the code that runs in any bankaccount object. And all my subclasses can share implementation details via the base class.

More Related Contents:

  1. What’s the best way of accessing field in the enclosing class from the nested class?
  2. Private inner classes in C# – why aren’t they used more often?
  3. How to restrict access to nested class member to enclosing class?
  4. What are reasons why one would want to use nested classes? [duplicate]
  5. How to use nested class in WPF XAML?
  6. How to get the value of string in c# from a testmethod In C# [closed]
  7. How to write code that runs once
  8. Why not inherit from List?
  9. What is the syntax for an inner join in LINQ to SQL?
  10. Is it better to return null or empty collection?
  11. Casting a variable using a Type variable
  12. ThreadStart with parameters
  13. Linq list of lists to single list
  14. Does the use of the “Async” suffix in a method name depend on whether the ‘async’ modifier is used?
  15. Mocking IPrincipal in ASP.NET Core
  16. How to ensure all data has been physically written to disk?
  17. String.Replace() vs. StringBuilder.Replace()
  18. Break out of a while loop that contains a switch statement
  19. C# DataGridView Checkbox checked event
  20. Handling multiple requests with C# HttpListener
  21. Process.Close() is not terminating created process,c#
  22. Execute unit tests serially (rather than in parallel)
  23. UWP on desktop closed by top X button – no event
  24. Using SqlDataAdapter to insert a row
  25. Changing the color of the title bar in WinForm
  26. Why would a class implement IDisposable explicitly instead of implicitly?
  27. Enable file logging for log4net from code instead of from configuration
  28. Seed Entities AND Users, Roles?
  29. How to know position(linenumber) of a streamreader in a textfile?
  30. Mouse Wheel Event (C#)

Leave a Comment