This article is an excerpt from the book Dr. Harvey and the 8 Fallacies of Distributed Computing which chronicles the misadventures of Dr. Harvey Fallacious, a 19th-century explorer and researcher, and also my great-great-great-great-great-grandfather. In it, he details his travels and explorations in remote, then-uncharted regions of South America, unknowingly dealing with the repercussions of the 8 Fallacies long before they were written down by Peter Deutsch, let alone the birth of the computer age.

When refactoring a part of an application we can use the existing tests to give a level of confidence that the refactored code still produces the same result, i.e. the existing tests still pass with the new implementations.

DateTime is a widely used .NET type. A lot of developers use it all the time, but not all of them really know how it works. In this post, I discuss DateTime.UtcNow: how it's implemented, what the latency and the resolution of DateTime on Windows and Linux, how the resolution can be changed, and how it can affect your application. This post is an overview, so you probably will not see super detailed explanations of some topics, but you will find a lot of useful links for further reading.