Is this a C#7 thing? The compile works with csc but not mcs: TaskRunner.cs(80,79): error CS0019: Operator `&&' cannot be applied to operands of type `bool?' and `bool?' -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.dot.net/pipermail/mono-devel-list/attachments/20171118/aa7bed61/attachment.html>