As a developer working with a team, there can often be newer language features in the language, that people on the team, just do not know about. The greater part of our teams code base was written in VS2008 and VS2010, so that would be .Net 3.5 and 4.0.
A while ago, no one had started to use the Task class. I found myself and introducing that class into our code, learning more about how it should be used, and teaching others how these features work. Adding business value will have a priority in a company, before technical debt issues are addressed. The need for performance in response time brought the use of Task to the forefront; introducing it helped both add business value, and moved the code forward from .Net 3.5 to .Net 4.0.
Software development is a career that requires constant learning and experimentation - which is why having a variety of information sources is very helpful. Today I was going through my unread emails and a CodeProject article of what had changed during the last 4 years since.Net was open sourced. This is the kind of article I can go back to for adding more of the language features to my tool box.
The starting link from there goes into the C# 7.2 feature of Span<T> and has a link to the MSDN article of Jan 2018 from Stephen Toub who is one of the key people I have read from Microsoft in showing how things work at a very technical level.
That got me to look a bit more and I came up with Mark Zhous' 10 part series on C#7 - which I need to go through - and start seeing if there are things that will make us more productive.
Learning after the fact - the new features that come out seems to be the norm. VS2019 just went into preview - and that will have C# 8.0.