app.config

<?xml version="1.0"?>
<configuration>
  <appSettings>
    <add key="ElasticSearchConfigFile" value="Config/ElasticSearch.config"/>
    <add key="LoggingConfigFile" value="Config/Logging.config"/>
  </appSettings>
<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/></startup></configuration>