using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace UnitTestProject3
{
    [TestClass]
    public class UnitTest2
    {
        [TestMethod]
        public void TestMethod1()
        {
            var a = new B();
             a.Foo();
        }


        public class A
        {
            public virtual void Foo()
            {
                return;
            }
        }

        public class B : A
        {
            public override void Foo()
            {
                //return;
            }
        }
    }
}