gistfile1.cs

        [Test]
        public void ShouldServeAsNonGenericIEqualityComparer()
        {
            Sample1 obj1 = new Sample1();

            EqualityHelper<Sample1> helper = new EqualityHelper<Sample1>();
            helper.Add(x => x.IntProp);
            helper.Add(x => x.StringProp);

            var hash = new Hashtable(helper);
            hash.Add(new Sample1() { IntProp = 2, StringProp = "asd" }, "doesn't matter");
            
            hash.ContainsKey(new Sample1() { IntProp = 2, StringProp = "asd" }).Should().Be.True();
            hash.ContainsKey(new Sample1() { IntProp = 3, StringProp = "asd" }).Should().Be.False();
        }

        [Test]
        public void ShouldServeAsGenericIEqualityComparer()
        {
            Sample1 obj1 = new Sample1();

            EqualityHelper<Sample1> helper = new EqualityHelper<Sample1>();
            helper.Add(x => x.IntProp);
            helper.Add(x => x.StringProp);

            var hash = new Dictionary<Sample1, string>(helper);
            hash.Add(new Sample1() { IntProp = 2, StringProp = "asd" }, "doesn't matter");

            hash.ContainsKey(new Sample1() { IntProp = 2, StringProp = "asd" }).Should().Be.True();
            hash.ContainsKey(new Sample1() { IntProp = 3, StringProp = "asd" }).Should().Be.False();
        }