public void TestToHashtable()
{
var wrapper = new BsonDocumentWrapper(new BsonDocument { { "x", 1 }, { "y", 2 } });
Assert.AreEqual(false, wrapper.IsMaterialized);
var hashtable = wrapper.ToHashtable();
Assert.AreEqual(true, wrapper.IsMaterialized);
Assert.AreEqual(2, hashtable.Count);
Assert.AreEqual(1, hashtable["x"]);
Assert.AreEqual(2, hashtable["y"]);
}