#647 – A struct Can Implement an Interface

You’ll most often see an interface implemented by a class, but a struct can also implement an interface.

struct implements an interface in the same way as a class–by listing the name of the interface after the name of the struct and then by providing implementations of the members in the interface.

Suppose that we had the following interface:

    public interface IBoxCalcs
        double CalcVolume();
        double CalcSurfaceArea();

We can then implement this interface in a struct.

    public struct BoxSize : IBoxCalcs
        public double x;
        public double y;
        public double z;

        // Constructor that fully initializes the object
        public BoxSize(double x, double y, double z)
            this.x = x;
            this.y = y;
            this.z = z;

        public double CalcVolume()
            return x * y * z;

        public double CalcSurfaceArea()
            return (2 * x * y) + (2 * x * z) + (2 * y * z);

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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