Get the user.config of one project in another project.

very easy, I've made 2 projects as you write.
and I've made ​​an app.config file in the project, like this:

<? xml version = "1.0" encoding = "utf-8"?>
<configuration>

   <! - ....... ->
   <! - ....... ->

   <connectionStrings>
     <add name="TEST" connectionString="Application 2"/>
   </ ConnectionStrings>
   <appSettings>
     <add key="App setting" value="Application 2"/>
   </ appSettings>

</ configuration>


as you can see, I gave two settings.
The first is the connectionString and appSetting
connectionString used to store the configuration database, you may be able to use the appSetting

change the file name as the name of your application, for example MyApplication.exe.config, before the name was changed app.config

The following configuration code to get inside MyApplication.exe.config

Configuration.ConfigurationManager.ConnectionStrings ("TEST"). ConnectionString
or
Configuration.ConfigurationManager.AppSettings ("App settings")