deployment/Deployment/ConfigurationBootstrapper.cs

using System;
using System.Dynamic;
using System.Reflection;
using System.Runtime.CompilerServices;
using Newtonsoft.Json;

[assembly: InternalsVisibleTo("deployment.tests")]
namespace greyn.Deployment
{
    public static class ConfigurationBootstrapper
    {
        private const string confpath = "appsettings.json";

        public static T Load<T>() where T : new()
        {
            if (File.Exists("appsettings.json"))
            {
                /*
                 * if the configuration expects new values we write them in.
                 * if you left other junk for whatever reason, get rekt
                 */
                var toReturn = JsonConvert.DeserializeObject<T>(File.ReadAllText(confpath)) ?? new T();
                File.WriteAllText(confpath, JsonConvert.SerializeObject(toReturn, Formatting.Indented));
                return toReturn;
            }
            else
            {
                var toReturn = new T();
                File.WriteAllText(confpath, JsonConvert.SerializeObject(toReturn));
                return toReturn;
            }
        }
    }
}