Interesting (and fun) post on the intricacies of function overriding, partial methods, side effects and ugly hacks (and evil code).
A breakdown post on comparing performance when opening files using lazy evaluated expressions, such as LINQ's IEnumerable extensions and plain old loading it all into memory.
await have been around for a while. Nonetheless, I can imagine that there are few of you out there who might have hurting heads on this topic. Hopefully, this piece will give you the basics you can use to get some relief.