Original link: The Truth About Value Types / Eric Lippert blog.
I just saw it referenced in a LinkedIn thread and considered it worth linking.
Eric Lippert is an expert. Microsoft 1996-2012 (first various VB flavors later on the C# team for many years). Coverity 2013-2015 (adding C# support to the static code analyzer). Meta 2016-2022 (working on Hack).