CustomConfigurationManager - pre ASP.NET 5 helper for working with environment variables for app settings

CustomConfigurationManager.cs

using System;
using System.Configuration;

public static class CustomConfigurationManager
{
    private static CustomAppSettings _appSettings = new CustomAppSettings();
    public static CustomAppSettings AppSettings { get { return _appSettings; } }
}
public class CustomAppSettings
{
    const string AppSettingsPrefix = "APPSETTING_";
    public string AppPrefix { get; set; }

    public string Get(string key)
    {
        return this[key];
    }

    public string this[string key]
    {
        get
        {
            string fullKey;
            if (!string.IsNullOrEmpty(AppPrefix))
            {
                fullKey = AppPrefix + "_" + key;
            }
            else
            {
                fullKey = key;
            }
            string value = Environment.GetEnvironmentVariable(AppSettingsPrefix + fullKey)
                            ?? Environment.GetEnvironmentVariable(fullKey)
                            ?? ConfigurationManager.AppSettings[fullKey]
                            ?? ConfigurationManager.AppSettings[key];

            return value;
        }
    }
}

@stuartleeks could you perhaps use CloudConfigurationManager instead? Is there anything am I underestimating in your implementation please? Thx 🍻

Does CloudConfigurationManager check environment variables? IIRC it checks the role config for cloud services