Implementing IDisposable on a subclass when the parent also implements IDisposable

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When I just override the Dispose(bool disposing) call, it feels really strange stating that I implement IDisposable without having an explicit Dispose() function (just utilizing the inherited one), but having everything else.

This is something you shouldn’t be concerned with.

When you subclass an IDisposable class, all of the “Dispose pattern” plumbing is already being handled for you by the base class. You really should do nothing but override the protected Dispose(bool) method, and track whether you’ve been disposed already (to properly raise ObjectDisposedException.)

For details, see my blog post on Subclassing from an IDisposable class.

Also, often, it’s a good idea to consider encapsulating the IDisposable class instead of subclassing it. There are times when subclassing an IDisposable class is appropriate, but they are somewhat rare. Encapsulation is often a better alternative.

More Related Contents:

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  2. Why not inherit from List?
  3. Use of Finalize/Dispose method in C#
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  6. Using statement vs. IDisposable.Dispose()
  7. What’s the correct alternative to static method inheritance?
  8. Should you implement IDisposable.Dispose() so that it never throws?
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  15. Who should call Dispose on IDisposable objects when passed into another object?
  16. Is there any way to call the parent version of an overridden method? (C# .NET)
  17. C# Covariance on subclass return types
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  19. Can I Override with derived types?
  20. Guidelines For Dispose() and Ninject
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  23. What’s the best way to ensure a base class’s static constructor is called?
  24. What’s the purpose of GC.SuppressFinalize(this) in Dispose() method?
  25. Who Disposes of an IDisposable public property?
  26. Automatically making Base Constructors available in derived class?
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