Chapter 1

1. No. However, sending a body with a GET request is not forbidden by the HTTP specifications, but such a request semantic is not defined either. It is preferable to avoid sending GET requests with a body.
2. Long methods are indicators that a method handles too many responsibilities and should be split into multiple methods or have some of the responsibilities extracted to other classes.
3. No. Target .NET Standard 2.0 when you want to support most runtime versions, like .NET Framework and .NET 6+. Target .NET Standard 2.1 to share code between Mono and Xamarin. Otherwise, target .NET 6+ directly.
4. A code smell represents a potential design flaw that could benefit from being rewritten.