#620 – Inherit from a Class In A Different Assembly

You can create a new class that inherits from a class that exists in another assembly (e.g. in a class library), as long as the parent class is public (and not sealed).

Let’s assume that someone gives you a copy of DogLibrary.dll, which includes two classes–a Dog class, which is defined as public and a DogMath class, which is defined as internal.

In another program, you can inherit from the Dog class, as long as you add a reference to the DogLibrary assembly.

You inherit from the Dog class just like you inherit from a class within your own program.

    public class Program
        public class CrazyDog : Dog
            public override void Bark()

        static void Main()
            CrazyDog myDog = new CrazyDog();

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.

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