(LR) Support Tips: why .Net script created in Visual Studio cannot be open in VuGen?

LoadRunner .Net Script created in Visual Studio is not a true LR script, but VS project.
VS project contains .usr file to allow mdrv or Controller to run it, Run-Time Settings and Scenario can be set from Vuser menu in Visual Studio.
But you can't open .usr under VS project from Vugen, because it is illegal VuGen script.

If you installed LRVS IDEAdd-In, in Visual Studio, open VS project, you can set RTS and create LR scenario from Vuser menu.