using System;

​

namespace test

{

    public interface ITestInterface

    {

        public bool TestMe() => false;

        public bool TestMe2();

    }

​

    public struct teststruct : ITestInterface

    {

        public int somevalue;

        // implementing this will create a NEW method but not implement the interface

        public bool TestMe() => true; 

        public bool TestMe2() => true; 

    }

​

    class a

    {

        public static void Main()

        {

            var ts = new teststruct();

            Console.WriteLine((ts as ITestInterface).TestMe());

            Console.WriteLine(ts.TestMe());

        }

    }

}