ec1d410907
- `SecurityIdentifier` will calculate `StrikePrice` just once. Replacing `!=` for a direct call to `Equals()` preventing unnecessary checks. - Slightly improving Linq queries at `OptionFilterUniverse` - Replace `OpenReader().CopyTo` for `Extract(stream)` avoids copying the data twice. - Replace `DateTime.Now` for `DateTime.UtcNow`