Iterating over a dynamic list

ForeachTest.cs

using System.Collections;
using Microsoft.VisualStudio.TestTools.UnitTesting;

namespace DynamicForeach
{
    [TestClass]
    public class ForeachTest
    {
        [TestMethod]
        public void ForeachDynamicTest()
        {
            var a = new {A = 1};
            var b = new {A = 1};
            var c = new {A = 1, B = 2};
            var array = new ArrayList {a, b, c};
            var total = 0;
            foreach (dynamic item in array)
            {
                total += item.A;
            }
            Assert.AreEqual(3, total);
        }
    }
}