Exploring top-level programs, functions, and namespaces

Since .NET 6, the default project template for console apps uses the top-level program feature introduced with .NET 5. It is important to understand how it works with the automatically generated Program class and its <Main>$ method.

Let’s explore how the top-level program feature works when you define functions:

1. Use your preferred coding tool to create a new project, as defined in the following list:
   • Project template: Console App / console
   • Project file and folder: TopLevelFunctions
   • Solution file and folder: Chapter01
   • Do not use top-level statements: Cleared
   • Enable native AOT publishing: Cleared
2. In Program.cs, delete the existing statements, define a local function at the bottom of the file, and call it, as shown in the following code:

   using static System.Console;
   WriteLine("Top-level functions example");
   WhatsMyNamespace...