When you hit a breakpoint in Visual Studio, everything stops. If you'd rather other processes keep running, you can enable that. If you've set multiple start projects to run when you start debugging, ...

As it runs in your browser’s sandbox there’s no compiler or terminal, and many extensions won’t run ... use for Visual Studio Code. Originally something of a skunk works project inside ...

And here's the payoff: If you use Visual Studio's option to set multiple startup projects, you can now press F5 and get a display like the one in Figure 1 that shows my form running on Android, ...