App.config with dll returns null

Question

I have a dll I'm calling from another app. I need to store dll settings in separate xml file. So I'v created App.config file. It is looks like:

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <appSettings>
    <add key="myKey" value="1"/>
  </appSettings>
</configuration>

Than I try to get value from config with thic code:

var val=System.Configuration.ConfigurationSettings.AppSettings["myKey"];

But it always return null. Also key count of AppSettings equals zero, so there is no keys in it.

What's wrong with it? How can I store my settings in separate file?

Answer 1

If I'm not mistaken, you're looking for ConfigurationManager.OpenMappedExeConfiguration Method (ExeConfigurationFileMap, ConfigurationUserLevel) .

You need to open that assembly configuration file as an another Configuration object, and once you've got it, you'll be able to access those AppSettings .

Answer 2

确保问题中提到的配置在调用应用程序的配置文件中，而不在DLL的App.config中。