For .Net8 debugging in isolated mode, you would to need to:

1. Follow the instruction posted by @Amor.

2. Copy local.setting.json file to your console app.

3. Copy Program.cs file into your console app.

4. Change your HostBuilder declaration as follow:

   var host = Host.CreateDefaultBuilder() .ConfigureAppConfiguration(app => { app.AddJsonFile("local.settings.json", optional: true, reloadOnChange: true) .AddEnvironmentVariables(); }) .ConfigureServices((context, services) => {//Your code here

   services.AddScoped<FunctionName>();
   

   }) .Build();

5. To get access to any value in the json file you would need to append Values: to the variable name as follow:

   var clientID = context.Configuration.GetValue("Values:clientId");