public void Delete()
{
var query =
from p in db.Table <Product>()
select p;
Assert.AreEqual(0, changeCount);
Assert.AreEqual(22, query.Count());
var pr = query.First();
pr.Price = 10000000;
db.Delete(pr);
Assert.AreEqual(1, changeCount);
Assert.AreEqual(21, query.Count());
db.DeleteAll <Product>();
Assert.AreEqual(2, changeCount);
Assert.AreEqual(0, query.Count());
}