First Example

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace InterfaceExample
{
    interface ICar
    {
        void setnumberOfWheels(int n);
        int getnumberOfWheels();
    }

    interface IMyInterface : ICar
    {
        void MethodToImplement();
    }

    class InterfaceImplementer  : IMyInterface
    {
        static void Main()
        {
            InterfaceImplementer iImp = new InterfaceImplementer ();

            iImp.setnumberOfWheels(4);
            iImp.getnumberOfWheels();
            iImp.MethodToImplement();

        }

        // Implementation of your 3 methods inherited from two interfaces (IMyInterface, ICar)
        public void MethodToImplement()
        {
            Console.WriteLine("MethodToImplement Called");
        }

        public void setnumberOfWheels(int n)
        {
            Console.WriteLine("setnumberOfWheels Called");
        }

        public int getnumberOfWheels()
        {
            Console.WriteLine("getnumberOfWheels Called");
            return 0;
        }
    }
}