i guess, but then you've got a dependency on a specific text editor's behavior. for WPF/XAML, the markup and code-behind are two separate files, so you can use

i guess, but then you've got a dependency on a specific text editor's behavior. for WPF/XAML, the markup and code-behind are two separate files, so you can use any text editor you want, but VS2019 shows them "grouped" together so you can open both files at once.