aranm

public interface IApplicationSettings 
{
  string Get(string key);
  string Get(string key, string defaultValue);
}

aranm

{
  "IsEncrypted": false,
  "Values": {
    "AzureWebJobsStorage": "UseDevelopmentStorage=true",
    "SuperApiKey": "VERY_SECRET_SECURE",
    "FUNCTIONS_WORKER_RUNTIME": "dotnet"
  },
  "ConnectionStrings": {
    "SqlConnectionString": "MyConnectionString" 
  } 

aranm

public class ApplicationSettings
{
  public string AzureWebJobsStorage { get; set; }
  public string SuperApiKey { get; set; }
}

public class ConnectionStrings
{
  public string SqlConnectionString { get; set; }
}

aranm

[assembly: FunctionsStartup(typeof(Startup))]
namespace MyFunctionsProject
{
  public class Startup : FunctionsStartup
  {
    public override void Configure(IFunctionsHostBuilder builder)
    {
      // this will bind to the "Values" section of the configuration
      builder
          .Services