#941 – Checking to See If Objects Are Disposable

If a type implements the IDisposable interface, you should always call the Dispose method on an instance of the class when you are done using it.  The presence of IDisposable indicates that the class has some resources that can be released prior to garbage collection.

Below is one pattern for checking to see if an object implements the IDisposable interface.

            Dog bob = new Dog("Bob", 5);
            bob.Bark();
            if (bob is IDisposable)
                ((IDisposable)bob).Dispose();

You can also use the using statement to automatically call Dispose on an object when you’re done using it.

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About Sean
Software developer in the Twin Cities area, passionate about .NET technologies. Equally passionate about my own personal projects related to family history and preservation of family stories and photos.

3 Responses to #941 – Checking to See If Objects Are Disposable

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  3. Mark Nicholson says:

    This is ineffecient. A better way (to avoid the double cast) is to use the as keyword and check for null, e.g., var disposableBob = bob as IDisposable; if (disposableBob != null) disposableBob.Dispose();

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