Converting MSBuild project files from legacy-style to SDK-style

I recently did this at work, and I decided to document the process here in the form of a how-to guide. Please note that I am not an expert, I am learning as I go along, so there may be mistakes.

Sdk-style project files have existed since net5. The kind of project files we were using before that can now be called legacy-style project files.

  • Legacy-style project files begin with <Project ToolsVersion="...
  • Sdk-style project files begin with <Project Sdk="Microsoft.NET.Sdk">.

Sdk-style project files are necessary if you want to:

  • Start using the `dotnet` command-line utility and all the functionality that it provides.
  • Eventually migrate to a modern version of dotnet.