The world's great app setting retriever!

appsetting.cs

public class ApiSettings
{
    public static ILog _logger = LogManager.GetLogger(typeof(ApiSettings));

    // Use enums to prevent typos
    public enum ConfigurationKeys
    {
        YesMailDomain,
        YesMailUserName,
        YesMailPassword,
        YesMailUrl,
        YesMailUseProxy
    }

    #region -- Constructors --
       
    public ApiSettings()
        : this(ConfigurationManager.AppSettings)
    {
    }

    public ApiSettings(NameValueCollection appSettings)
    {
        // You can pass in settings for testing.
        this.Url = ReadConfig(ConfigurationKeys.YesMailUrl, appSettings);
        this.UserName = ReadConfig(ConfigurationKeys.YesMailUserName, appSettings);
        this.Password = ReadConfig(ConfigurationKeys.YesMailPassword, appSettings);
        this.Domain = ReadConfig(ConfigurationKeys.YesMailDomain, appSettings);

        this.UseProxy = bool.Parse(appSettings[ConfigurationKeys.YesMailUseProxy.ToString()]);
            
        if (this.UseProxy)
        {
            // ProxySettings is a nearly identical class but it's nested in this class
            // So you can access it like so..
            // var mySettings = new ApiSettings;
            // var myProxyUserName = mySettings.ProxySettings.UserName;
            this.ProxySettings = new ProxySettings(appSettings);    
        }

        LogSettings(this);
    }

    // It throws KeyNotFoundException instead of the usually nullException
    private static string ReadConfig(ConfigurationKeys key, NameValueCollection appSettings)
    {
        var value = "";
        try
        {
            value = appSettings[key.ToString()];
        }
        catch (Exception)
        {
            // It even tells you what key was missing!
            throw new KeyNotFoundException("App Settings Key not found for: " + key.ToString());
        }
        return value;

    }

    // Yup, does that too.
    private void LogSettings(ApiSettings apiSettings)
    {         
        var sb = new StringBuilder();

        sb.Append("\n\nApiSettings\n-----------\n")
            .Append("Url: ").Append(apiSettings.Url).Append("\n")
            .Append("Domain: ").Append(apiSettings.Domain).Append("\n")
            .Append("UserName: ").Append(apiSettings.UserName).Append("\n")
            .Append("Password: ").Append(apiSettings.Password).Append("\n")
            .Append("UseProxy: ").Append(apiSettings.UseProxy).Append("\n");
            
        _logger.Debug(sb.ToString());
        
    }

    public ApiSettings(String domain, String userName, String password, String url, bool useProxy)
    {
        this.Url = url;
        this.UserName = userName;
        this.Password = password;
        this.Domain = domain;
        this.UseProxy = useProxy;
        this.ProxySettings = new ProxySettings();
    }

    public ApiSettings(String domain, String userName, String password, String url, bool useProxy, 
        String proxyDomain, String proxyUserName, String proxyPassword, String proxyAddress, int proxyPort)
    {
        this.Url = url;
        this.UserName = userName;
        this.Password = password;
        this.Domain = domain;
        this.UseProxy = useProxy;
        this.ProxySettings = new ProxySettings(proxyDomain, proxyUserName, proxyPassword, proxyAddress, proxyPort);
    }

    #endregion -- Constructors --

    public string Url { get; set; }

    public string UserName { get; set; }

    public string Password { get; set; }

    public bool UseProxy { get; set; }

    public ProxySettings ProxySettings { get; set; }

    public string Domain{ get; set; }

        
}