pulumi/sdk/dotnet/Pulumi/Config.cs

using System;
using System.Collections.Generic;
using Newtonsoft.Json;

namespace Pulumi {
    public class Config {
        private string m_prefix;

        private static Dictionary<string, string> s_config = loadConfig();

        static Dictionary<string, string> loadConfig() {
            string envValue = Environment.GetEnvironmentVariable("PULUMI_CONFIG");
            if (envValue != null) {
                return JsonConvert.DeserializeObject<Dictionary<string, string>>(envValue);
            }

            return new Dictionary<string, string>();
        }

        public Config(string name) {
            m_prefix = name;
        }

        private string FullKey(string name) {
            return m_prefix + ":" + name;
        }

        public string this[string name] {
            get { 
                return s_config[FullKey(name)];
            }
        }
    }
}