using System;

​

namespace Test {

    public class Test

    {

        public static void Main()

        {

            ISomeInterface instance = new DemoStruct();

            // converting struct to an interface causes boxing

            instance.DoSomeStuff();

            //this method is not a member of the interface so it is not available at this instance

            //instance.DoSomeOtherStuff();

        }

    }

    public interface ISomeInterface 

    {

        void DoSomeStuff(); 

    }

    public struct DemoStruct : ISomeInterface 

    {    

        public void DoSomeStuff(){

            Console.WriteLine("Do some stuff ...");

        }

        // this method is not available when accessing via interface

        public void DoSomeOtherStuff() 

        {

            Console.WriteLine("Do some other stuff ...");

        }

        // Vistual members are not allowed in structures

        //public virtual void VirtualMethod() 

        //{

        //  

        //}

    }

    // This kind of inheritance is not allowed !!!

    // public struct OtherStruct : DemoStruct 

    // {

    //  

    // }

}