How can I load the current web.config/app.config as XML

Question

I am trying to load a custom section using the standard XmlSerializer from the current app/webapp's config file.

The below solution doesn't work for web apps:

var configFilePath =
    ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None)
    .FilePath;

if (configFilePath == null || !File.Exists(configFilePath))
    return null;

var xdoc = XDocument.Load(configFilePath);

var section =
    xdoc.Root?.Element("ParentSection")?.Element("MySection");

if (section == null)
    return null;

var serializer = new XmlSerializer(typeof(MyConfigType));

MyConfigType config;

using (var reader = new StringReader(section.ToString()))
{
    config = serializer.Deserialize(reader) as MyConfigType;
}

How can this be done easily without check if the current app is a web app or not?

(Without using System.Web.Configuration.WebConfigurationManager.OpenWebConfiguration?)

Answer 1

The config file path can be resolved like so:

var configFilePath =
    AppDomain.CurrentDomain.SetupInformation.ConfigurationFile;

Answer based on Sean's deleted answer https://stackoverflow.com/a/27038942/38368 to a different question