Connection String in WinForm App

in exe or dll apps connection string can be placed in config file like in web apps.

it can be set in app.config file like this

<?xml version="1.0"?>
<configuration>
  <startup>
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/>
  </startup>
  <appSettings>
    <add key ="ConnectionString" value="data source=vaughan;initial catalog=Aviva_Dev;persist security info=False;user id=sa;Password=noway.in;"/>
  </appSettings>
</configuration>

and can be read like this

ConfigurationManager.AppSettings("ConnectionString")