Wrong results and slow than simple LINQ on large list of items

[maxmun]

I wrote this test method and found wrong results and really bad performance...
Test results: 
Expected: 10085
But was: 101707225

[Test]
public void EquatableIndexLookupResolves()
{
	List<SimpleClass> someItems = new List<SimpleClass> {
									new SimpleClass {Name = "Jason", Age = 25},
									new SimpleClass {Name = "Aaron", Age = 37}
							};

        Random rand = new Random();

        for (int i = 0; i < 1000000; i++)
        {
            var name = CreateRandomString(stringLength: 10);
            int age = rand.Next(1, 100);

            someItems.Add(new SimpleClass { Name = name, Age = age });
        }
        var someItemsArray = someItems.ToArray();

        var ages = someItemsArray.Where(s => s.Age == 25);
        var countAges = ages.Count();

        var indexOnSomeItems =
			new EqualityIndex<SimpleClass>(
                    someItemsArray,
					typeof(SimpleClass).GetProperty("Age"));
        var jason = indexOnSomeItems.WhereThroughIndex(item => item.Age == 25);
        var countIndexedAges = jason.Count();
    
        Assert.AreEqual(countAges, countIndexedAges);
}

[jogibear9988]

We don't use this project any more....
So if you look for the error and create a pull, I will merge it, if not, I've no time to fix.
sorry