OptionalTextFileSettings.cs - For ServiceStack. If the file exists, it loads it and sets its settings. (e.g. use it for loading a local ".env" file, similar to dotenv for Ruby)

OptionalTextFileSettings.cs

using System.Collections.Generic;
using System.IO;

namespace ServiceStack.Configuration
{
    public class OptionalTextFileSettings : ISettings, IAppSettings
    {
        private readonly DictionarySettings _settings;

        public OptionalTextFileSettings(string filePath, string delimiter = " ")
        {
            if(File.Exists(filePath))
                _settings = new DictionarySettings(File.ReadAllText(filePath).ParseKeyValueText(delimiter));
            else
                _settings = new DictionarySettings();
        }

        public string Get(string key)
        {
            return _settings.Get(key);
        }

        public Dictionary<string, string> GetAll()
        {
            return _settings.GetAll();
        }

        public List<string> GetAllKeys()
        {
            return _settings.GetAllKeys();
        }

        public bool Exists(string key)
        {
            return _settings.Exists(key);
        }

        public void Set<T>(string key, T value)
        {
            _settings.Set<T>(key, value);
        }

        public string GetString(string name)
        {
            return _settings.GetString(name);
        }

        public IList<string> GetList(string key)
        {
            return _settings.GetList(key);
        }

        public IDictionary<string, string> GetDictionary(string key)
        {
            return _settings.GetDictionary(key);
        }

        public T Get<T>(string name)
        {
            return _settings.Get<T>(name);
        }

        public T Get<T>(string name, T defaultValue)
        {
            return _settings.Get<T>(name, defaultValue);
        }
    }
}