public void SaveAndRetrieve()
{
var collection = mongoDBFixture.Database
.GetCollection <TestDocument>(collectionName);
List <TestDocument> IEnumerable;
collection.InsertOne(TestDocument.DummyData1());
collection.InsertOne(TestDocument.DummyData2());
collection.InsertOne(TestDocument.DummyData3());
IEnumerable = (from c in collection.AsQueryable()
where c.StringTest == TestDocument.DummyData2().StringTest || c.StringTest == TestDocument.DummyData3().StringTest
select c).ToList();
Assert.Equal(2, IEnumerable.Count());
}