Index: Ringtoets/HydraRing/src/Ringtoets.HydraRing.Calculation/Parsers/IllustrationPoints/IllustrationPointsParser.cs
===================================================================
diff -u -r5dabca97fffab41012aafa58da5bc4cd0192e947 -r16559315c0a64fffd05827d249200c62e353231f
--- Ringtoets/HydraRing/src/Ringtoets.HydraRing.Calculation/Parsers/IllustrationPoints/IllustrationPointsParser.cs	(.../IllustrationPointsParser.cs)	(revision 5dabca97fffab41012aafa58da5bc4cd0192e947)
+++ Ringtoets/HydraRing/src/Ringtoets.HydraRing.Calculation/Parsers/IllustrationPoints/IllustrationPointsParser.cs	(.../IllustrationPointsParser.cs)	(revision 16559315c0a64fffd05827d249200c62e353231f)
@@ -356,7 +356,8 @@
         {
             return windDirections.SelectMany(windDirection =>
                                                  closingSituations.Select(
-                                                     closingSituation => Tuple.Create(windDirection.Key, windDirection.Value, closingSituation.Key, closingSituation.Value)));
+                                                     closingSituation => Tuple.Create(windDirection.Key, windDirection.Value, closingSituation.Key, closingSituation.Value)))
+                                 .ToArray();
         }
 
         private IllustrationPointTreeNode BuildFaultTree(