using System;

public class Program

{

    interface IFoo{

         int I {get;set;}

    }

    struct Foo: IFoo{

    public int i;

    public int I

        {

            get { return i;}

            set { i = value; }

        }           

    }

    static  Foo foo2=new Foo();

    public static void Main()

    {

        IFoo if2=foo2;

        if2.I=2;

        Console.WriteLine(foo2.i);

    }

}