public void WhereClauseWithAddHours()
        {
            var store          = new EntityStore(_dbConnection);
            var singleEmployee = store.GetSingle <Order>(o => SqlFunctions.AddHours(o.OrderDate, -3) >= DateTime.Now.AddHours(-90 * 12 * 30 * 24));

            Xunit.Assert.NotNull(singleEmployee);
        }