Safest way to run BAT file from Powershell script

Question

I can not get a powershell script to execute a bat file directly. For example, this works on the command line:

.\\\\my-app\\my-fle.bat

When

Answer 1

To run the .bat, and have access to the last exit code, run it as:

 & .\my-app\my-fle.bat