WebApplication - Reading the port from environment

This sample uses the brand new WebApplication hosting class. In this example we set Kestrel port from an environment variable PORT. You can open the page at http://localhost:3000 or http://localhost:5000 if you have set up the environment variable PORT to 5000.

How to set Environment Variable PORT on Windows using PowerShell

dir env: will show all environment variables.

$env:PORT = 5000 will set the environment variable PORT to 5000.