title: Any way to catch exception from .dll in .net
body: <p>I'm trying to restructure an app.config file, adding some custom tags. It's rather copmplex structure, like three pieces of <em>ConfigurationElementCollection</em> nested within each other.
  On program run, it's silently dying, outputting the single line like <code>System.Configuration.ConfigurationErrorsException occurred in System.Configuration.dll</code>. 
  It's most certainly not enough to determine the cause. How do I get more information of it, at least the text of exception?</p>
  
  <p><strong>P.S.</strong> This is WPF application</p>