{

    class clsA

    {

        private int _i;

        public int I

        {

            set { _i = value; }

            get { return _i; }

        }

    }

    struct strctB

    {

        private int _i;

        public int I

        {

            set { _i = value; }

            get { return _i; }

        }

    }

    class Program

    {

        static void Main1(string[] args)

        {

            clsA a1=new clsA();

            a1.I=;

            clsA a2=a1;

            a2.I=;

            Console.WriteLine("{0},{1}", a1.I, a2.I);//2,2

            strctB b1=new strctB();

            b1.I = ;

            strctB b2=b1;

            b2.I = ;

            Console.WriteLine("{0},{1}", b1.I, b2.I);//1,2

        }

        static void Main(string[] args)

        {

            clsA a1 = new clsA();

            a1.I = ;

            clsA a2 = new clsA();

            a2.I = ;

            Console.WriteLine("{0}", a1.Equals(a2));//False

            strctB b1 = new strctB();

            b1.I = ;

            strctB b2 = new strctB();

            b2.I = ;

            Console.WriteLine("{0}", b1.Equals(b2));//True

        }

    }

}