Why can’t I deploy my UWP app with .Net Standard 2.0 to a Mobile device or emulator?

Several developers have been confused recently because they created new UWP apps using .Net Standard 2.0 and then weren’t able to deploy the app to their Windows 10 Mobile devices.  Additionally, when trying to use the emulator, no debug targets show up in Visual Studio 2017. UWP apps do not support .Net Standard 2.0 on…