Access Appconfig

<configuration>
  <connectionStrings>

    <add name ="con" connectionString="Provider=Microsoft.ACE.OLEDB.12.0;Data Source=D:\Tiles.accdb;Jet OLEDB:Database Password=sync;"/>

  </connectionStrings>
</configuration>

 OleDbConnection con = new OleDbConnection(ConfigurationManager.ConnectionStrings["con"].ConnectionString);