#630 – Nested Type May Hide Member in Outer Class

If you declare a nested type that has the the same name as a member of the outer type, the nested type hides the original member in the outer type.

For example, you might have a Dog class that defines a property named DogCollar, but a subclass of Dog that replaces the property with a nested type named DogCollar.

    public class Dog
        public string Name { get; set; }
        public int DogCollar { get; set; }

    public class Terrier : Dog
        private DogCollar collar;

        public Terrier(int collarLen)
            collar = new DogCollar(collarLen);

        new private class DogCollar
            public int Length { get; set; }

            public DogCollar(int length)
                Length = length;

When replacing a member of the outer type, you can use the new keyword to make explicit the fact that you are replacing the member in the outer type.


About Sean
Software developer in the Twin Cities area, passionate about software development and sailing.

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