public void TestNotFilter()
{
var termFilter = new TermFilter("age", 24);
var notFilter = new NotFilter(termFilter);
var termQuery = new TermQuery("type", "common");
var q = new FilteredQuery(termQuery, notFilter);
var result2 = client.Search(index, "type" , q, 0, 5);
Assert.AreEqual(2, result2.GetTotalCount());
Assert.AreEqual(2, result2.GetHits().Hits.Count);
}