This is an example:

 

<?xml version="1.0"?>
<configuration>
 <appSettings>
  <add key="ConnectionString" value="server=(local)\portal;database=SamplePortal;uid=test;pwd=test"/>  

   <add key="CuteChat.DataDirectory" value="DesktopModules/CuteSoft_Client/CuteChat" />
 </appSettings>
 <system.web>
  <compilation defaultLanguage="c#" debug="true"/>
    <customErrors mode="Off"/>
    <authentication mode="Forms">
   <forms name=".UserManagementASPXAUTH" loginUrl="~/Login.aspx"/>
  </authentication>
  <authorization>
   <allow users="*"/>
  </authorization>
  <trace enabled="true"></trace>
  <sessionState mode="InProc" timeout="20"/>
  <globalization requestEncoding="utf-8" responseEncoding="utf-8"/>
  <xhtmlConformance mode="Legacy"/></system.web>
</configuration>