Assuming that you have .NET core installed, run the example from this directory:
HOST={YOUR HOST} API_KEY={YOUR KEY} API_SECRET={YOUR SECRET} dotnet run
If you are using Windows, then run from Powershell:
$env:HOST = '{YOUR HOST}'; $env:API_KEY = '{YOUR KEY}'; $env:API_SECRET = '{YOUR SECRET}'; `
dotnet run; Remove-Item Env:\HOST; Remove-Item Env:\API_KEY; Remove-Item Env:\API_SECRET