Comment configurer l'ORM ?

<system.diagnostics>
  <trace autoflush="true" indentsize="2" />
  <sources>
    <source name="osamesOrmTraceSource" switchName="mySwitch" switchType="System.Diagnostics.SourceSwitch">
      <listeners>
        <clear/>
        <add name="textwriterListener" type="System.Diagnostics.TextWriterTraceListener" initializeData="OsamesOrm.log" traceOutputOptions="DateTime">
          <!-- le filtre laisse passer les message de niveau personnalisé -->
          <filter type="System.Diagnostics.EventTypeFilter" initializeData="Verbose"/>
        </add>
      </listeners>
    </source>
    <source name="osamesOrmDetailedTraceSource" switchName="mySwitch" switchType="System.Diagnostics.SourceSwitch">
      <listeners>
        <clear/>
        <add name="textwriterListener" type="System.Diagnostics.TextWriterTraceListener" initializeData="OsamesOrm_err_detail.log" traceOutputOptions="DateTime, Callstack">
          <!-- le filtre laisse passer les message de niveau erreur seulement -->
          <filter type="System.Diagnostics.EventTypeFilter" initializeData="Error"/>
        </add>
      </listeners>
    </source>
  </sources>
  <switches>
    <!-- un seul switch qui permet à tous les listeners d'écouter -->
    <add name="mySwitch" value="All" />
  </switches>
</system.diagnostics>

<system.data>
    <DbProviderFactories>
      <add name="SQLite Data Provider" invariant="System.Data.SQLite" description=".Net Framework Data Provider for SQLite" type="System.Data.SQLite.SQLiteFactory, System.Data.SQLite, Version=1.0.94.0, Culture=neutral, PublicKeyToken=db937bc2d44ff139" />
      <!--<add name="SqlClient Data Provider" invariant="System.Data.SqlClient" description=".Net Framework Data Provider for SqlServer" type="System.Data.SqlClient.SqlClientFactory, System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>-->
      <!--<add name="MySQL Data Provider" invariant="MySql.Data.MySqlClient" description=".Net Framework Data Provider for MySQL" type="MySql.Data.MySqlClient.MySqlClientFactory, MySql.Data, Version=6.3.5.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" />-->
      <!--<add name="Npgsql Data Provider" invariant="Npgsql" support="FF" description=".Net Framework Data Provider for Postgresql Server" type="Npgsql.NpgsqlFactory, Npgsql, Version=2.0.1.0, Culture=neutral, PublicKeyToken=5d8b90d52f46fda7" />-->
    </DbProviderFactories>
  </system.data>