Interesting. I found https://msdn.microsoft.com/en-us/library/system.datetime(v=v... and there in the long list of methods is a link to https://msdn.microsoft.com/en-us/library/1k1skd40(v=vs.110).... , which doesn't have the example.

.NET allows for function overloading, so usually the examples tend to be on the same page where all variants get listed, not on every single one.

With the main page for a class listing the most common use cases.