using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

​

namespace AAAAAAAAAAA

{

    public interface A

    {

        public void XYZ() => Console.WriteLine("A");

    }

​

    public interface B

    {

        public void XYZ() => Console.WriteLine("B");

    }

​

    public interface C : A, B

    {

    }

​

    public class Dupa : C

    {

    }

    public class Test

    {

        pubic void T()

        {

            new Dupa().XYZ();

        }

    }

}

​