C#

<br />
class Program<br />
    {<br />
        static void Main(string[] args)<br />
        {<br />
            try<br />
            {<br />
                A ref1 = new A(); <br />
                A ref2 = new B();<br />
                B ref3 = new B();<br />
<br />
                ref1.Y(); <-- A.Yell<br />
                ref2.Y(); <-- B.Yell<br />
                ref3.Y(); <-- Always B.Yell, regardless whether you decorated Yell() with "new" or not! (This makes the keyword useless)<br />
            }<br />
            catch (Exception Ex)<br />
            {<br />
                Console.WriteLine("Main.Exception - " + Ex.ToString());<br />
            }<br />
<br />
            return;<br />
        }<br />
<br />
        class A<br />
        {<br />
            public void Yell()<br />
            {<br />
                Console.WriteLine("A.Yell");<br />
            }<br />
        }<br />
<br />
        class B : A<br />
        {<br />
            public new void Yell()<br />
            {<br />
                Console.WriteLine("B.Yell");<br />
            }<br />
        }<br />
    }<br />