I published my first VisualStudio extension on 26th February 2018. It was initially created for Visual Studio 2017, but a few months later Visual Studio 2019 came out and I needed to support it as I was one of the beneficent. The migration was straightforward: it required only to extend InstallationTarget range to [15.0,17.0) in vsixmanifest, re-compile, and of course, re-publish the extension to the Visual Studio marketplace. Recently, the Visual Studio 2022 Preview was published.
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