<p><strong>Pour EF 6</strong></p>
<pre><code class="lang-auto">using System.Data.Entity;
query.Include(x => x.Collection.Select(y => y.Property))
</code></pre>
<p>Assurez-vous d’ajouter <code>using System.Data.Entity;</code> pour obtenir la version de <code>Include</code> qui accepte une expression lambda.</p>
<p><strong>Pour EF Core</strong></p>
<p>Utilisez la nouvelle méthode <a href="https://learn.microsoft.com/en-us/ef/core/querying/related-data#including-multiple-levels"><code>ThenInclude</code></a></p>
<pre><code class="lang-auto">using Microsoft.EntityFrameworkCore;
query.Include(x => x.Collection)
.ThenInclude(x => x.Property);
</code></pre>