Convert C# top-level statements to the old-style Program class

The top-level statements are a feature introduced in C# 10. The idea is to reduce the boilerplate code needed to define aplication’s entry point. So instead of the traditional:

using System;

namespace Application
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Hello World!");
        }
    }
}Code language: C# (cs)

We can write the code directly in the main project’s file, which reduces the code to just one line:

Console.WriteLine("Hello, World!");Code language: JavaScript (javascript)

.NET 6 templates use this new, concise form by default. But I find it rather confusing to have one file in a project follow different syntax rules or conventions. I see the traditional way as simpler, even if a bit more verbose. So how to fastest convert between one form and another?

Hopefully, if you have ReSharper 2022.2, there is an automatic conversion available, albeit a bit hard to discover. It seems to appear when you place your cursor on… an empty like in the Program.cs file with top-level statements, and click the hammer icon, or press Alt+Enter:

When selected, the conversion works just fine:

The reverse action, transforming Program.cs class into the compact form, is similarly available. This one is a bit easier to find: it’s in the line where the Program class starts.