C# 9 is out and there are a bunch of new features. But do we really need them? Just because they are new does not make them valuable. In this video, we will look at five new features. We will identify how to use each and then talk about where they are useful (as well as where they are not useful). We won’t be covering records because they deserve their own video, which comes out in a couple of days.

Source code: https://leadmagnets.app/?Resource=FiveFeaturesCSharp9
Patreon: https://www.patreon.com/IAmTimCorey
Mailing List: https://signup.iamtimcorey.com/
Purchase courses: https://iamtimcorey.com

0:00 – Intro
0:55 – Getting started: Visual Studio version
1:46 – 1. Top Level Calls …
4:23 – /* Note: Inline parameter name (VS feature) *
/
8:43 – /* Note: .Net 5 vs .Net core *
/
11:07 – 1. … Top Level Calls
18:55 – Why top level calls?
23:20 – 2. Initial setter
s
32:28 – 3. Known object type shorthand instantiation

40:36 – Recap and creating new demo Blazor app
42:30 – Demo Blazor app “fetch data”
44:17 – Improving Demo Blazor app “fetch data” code
47:45 – 4. Relational pattern matching in switch expression
54:18 – 5. Logical pattern matching in switch expression
1:04:24 – 6. “is not” pattern
1:08:30 – Recap
1:08:58 – Summary and concluding remarks

Thanks to Ralfs HBK for the chapter breakdown