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    copied!<p>I would use something like this:</p> <pre><code>var r = a.GroupBy(e =&gt; e.cvAnoFicFin).Select(g =&gt; new { Year = g.Key, Jan = g.Where(e =&gt; e.cvMesFicFin == 1) .Select(c =&gt; (int?)c.cvVlrBasFicFin).SingleOrDefault(), Feb = g.Where(e =&gt; e.cvMesFicFin == 2) .Select(c =&gt; (int?)c.cvVlrBasFicFin).SingleOrDefault(), Mar = g.Where(e =&gt; e.cvMesFicFin == 3) .Select(c =&gt; (int?)c.cvVlrBasFicFin).SingleOrDefault(), Apr = g.Where(e =&gt; e.cvMesFicFin == 4) .Select(c =&gt; (int?)c.cvVlrBasFicFin).SingleOrDefault(), May = g.Where(e =&gt; e.cvMesFicFin == 5) .Select(c =&gt; (int?)c.cvVlrBasFicFin).SingleOrDefault(), Jun = g.Where(e =&gt; e.cvMesFicFin == 6) .Select(c =&gt; (int?)c.cvVlrBasFicFin).SingleOrDefault(), Jul = g.Where(e =&gt; e.cvMesFicFin == 7) .Select(c =&gt; (int?)c.cvVlrBasFicFin).SingleOrDefault(), Aug = g.Where(e =&gt; e.cvMesFicFin == 8) .Select(c =&gt; (int?)c.cvVlrBasFicFin).SingleOrDefault(), Sep = g.Where(e =&gt; e.cvMesFicFin == 9) .Select(c =&gt; (int?)c.cvVlrBasFicFin).SingleOrDefault(), Oct = g.Where(e =&gt; e.cvMesFicFin == 10) .Select(c =&gt; (int?)c.cvVlrBasFicFin).SingleOrDefault(), Nov = g.Where(e =&gt; e.cvMesFicFin == 11) .Select(c =&gt; (int?)c.cvVlrBasFicFin).SingleOrDefault(), Dec = g.Where(e =&gt; e.cvMesFicFin == 12) .Select(c =&gt; (int?)c.cvVlrBasFicFin).SingleOrDefault() }); </code></pre> <p>The idea is stolen from this answer: <a href="https://stackoverflow.com/a/167937/276994">https://stackoverflow.com/a/167937/276994</a>.</p> <p>If the data represent the database entries, than <code>cvVlrBasFicFin</code> is perhaps already nullable, so the cast is not needed.</p>
 

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