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    <p>You can use something like</p> <pre><code>var q = (from d in db.Direccion where d.Activo == true select new { IdEstructura = d.IdDireccion, Descripcion = d.Descripcion, IdPadre = 0, lstEstructurasHijos = d.Cliente.Select(C =&gt; new { IdEstructura = C.IdCliente, Descripcion = C.Descripcion, IdPadre = C.IdDireccion, lstEstructurasHijos = C.Campana.Select(Ca =&gt; new { IdEstructura = Ca.IdCampana, Descripcion = Ca.Descripcion, IdPadre = Ca.IdCliente, lstEstructurasHijos = Ca.Servicio.Select(S =&gt; new { IdEstructura = S.IdServicio, Descripcion = S.Descripcion, IdPadre = S.IdCampana }) }) }) } into query select query).ToList(); var result = q.Select(d=&gt;new Estructura { IdEstructura = d.IdEstructura, Descripcion = d.Descripcion, IdPadre = d.IdPadre, lstEstructurasHijos = d.Cliente.Select(C =&gt; new Estructura { IdEstructura = C.IdEstructura, Descripcion = C.Descripcion, IdPadre = C.IdPadre, lstEstructurasHijos = C.Campana.Select(Ca =&gt; new Estructura { IdEstructura = Ca.IdEstructura, Descripcion = Ca.Descripcion, IdPadre = Ca.IdPadre, lstEstructurasHijos = Ca.Servicio.Select(S =&gt; new Estructura { IdEstructura = S.IdEstructura, Descripcion = S.Descripcion, IdPadre = S.IdPadre }) }) }) } </code></pre> <p>It's work for me</p> <blockquote> <p>How can I Defined a default empty hashset for this Ienumerable?</p> </blockquote> <p>Just delete <code>lstEstructurasHijos = new HashSet&lt;Estructura&gt;()</code> from query and allow constructor initialize empty list</p> <pre><code> public class Estructura { public Estructura() { //!!! this.lstEstructurasHijos = new HashSet&lt;Estructura&gt;(); } //... } </code></pre>
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    1. POlinq error Defined default value for hashset
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    1. USBohdan Lyzanets
    1. USBohdan Lyzanets
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A row detail

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