Index: Ringtoets/Common/src/Ringtoets.Common.Forms/Views/RingtoetsMapDataFeaturesFactory.cs
===================================================================
diff -u -re182f6f394aa75e739467a77e7bcacd9a8b25429 -r8dcb8c0fa8992c488bdea7d0631c84b7b1b09e61
--- Ringtoets/Common/src/Ringtoets.Common.Forms/Views/RingtoetsMapDataFeaturesFactory.cs	(.../RingtoetsMapDataFeaturesFactory.cs)	(revision e182f6f394aa75e739467a77e7bcacd9a8b25429)
+++ Ringtoets/Common/src/Ringtoets.Common.Forms/Views/RingtoetsMapDataFeaturesFactory.cs	(.../RingtoetsMapDataFeaturesFactory.cs)	(revision 8dcb8c0fa8992c488bdea7d0631c84b7b1b09e61)
@@ -233,8 +233,9 @@
         {
             if ((calculations != null && calculations.Any()))
             {
-                MapCalculationData[] calculationData = Enumerable.ToArray<MapCalculationData>(calculations.Where(CalculationHasStructureAndHydraulicBoundaryLocation<T, U>)
-                                                                                                          .Select(CreatemapCalculationData<T, U>));
+                MapCalculationData[] calculationData = calculations.Where(CalculationHasStructureAndHydraulicBoundaryLocation<T, U>)
+                                                                   .Select(CreatemapCalculationData<T, U>)
+                                                                   .ToArray();
 
                 return CreateCalculationFeatures(calculationData);
             }