How to read an assembly.dll.config

There is the common misconception that only a app.exe.config can be read in .NET C#. The truth is that the app.config is automatically read, while any other (correctly formed) app.config XML file can be read "manually".

To open a named config file:

• Reference System.Configuration.dll assembly
• Using System.Configuration
• Create code like:

  
Configuration GetDllConfiguration(Assembly targetAsm) {
  var configFile = targetAsm.Location + ".config";
  var map = new ExeConfigurationFileMap {
    ExeConfigFilename = configFile
  };
  return ConfigurationManager.OpenMappedExeConfiguration(map, ConfigurationUserLevel.None);

}

Sources:

• stackoverflow: Reading dll.config (not app.config!) from a plugin module

Keywords: .NET, C#, app.config, dll.config, ConfigurationManager