#799 – Interface Members Are Implicitly Public

When you declare an interface, you cannot use access modifiers on interface’s member.  An interface makes a collection of members available to code that accesses a class implementing that interface.  So it makes sense that the interface members are public.

    public interface IBark
    {
        int BarkCount { get; set; }
        void Bark(string woofSound, int count);
    }

When you implement an interface, you must mark the interface members as public.

    public class Dog : IBark
    {
        public int BarkCount { get; set; }

        public void Bark(string woofSound, int count)
        {
            for (int i = 1; i <= count; i++)
                Console.WriteLine(woofSound);
        }
    }

If you implement the interface explicitly, the members are implicitly public and you cannot mark them with access modifiers.

        int IBark.BarkCount { get; set; }

        void IBark.Bark(string woofSound, int count)
        {
            for (int i = 1; i <= count; i++)
                Console.WriteLine(woofSound);
        }