Index: Ringtoets/ClosingStructures/src/Ringtoets.ClosingStructures.Forms/Views/ClosingStructuresScenariosView.cs
===================================================================
diff -u -r83ac738ad69ef53eba6ca4f647657e5b7f024b96 -r16559315c0a64fffd05827d249200c62e353231f
--- Ringtoets/ClosingStructures/src/Ringtoets.ClosingStructures.Forms/Views/ClosingStructuresScenariosView.cs	(.../ClosingStructuresScenariosView.cs)	(revision 83ac738ad69ef53eba6ca4f647657e5b7f024b96)
+++ Ringtoets/ClosingStructures/src/Ringtoets.ClosingStructures.Forms/Views/ClosingStructuresScenariosView.cs	(.../ClosingStructuresScenariosView.cs)	(revision 16559315c0a64fffd05827d249200c62e353231f)
@@ -58,8 +58,7 @@
             calculationInputObserver = new RecursiveObserver<CalculationGroup, ICalculationInput>(
                 UpdateDataGridViewDataSource, cg => cg.Children.Concat<object>(cg.Children
                                                                                  .OfType<StructuresCalculation<ClosingStructuresInput>>()
-                                                                                 .Select(c => c.InputParameters))
-                                                                                 .ToArray());
+                                                                                 .Select(c => c.InputParameters)));
             calculationGroupObserver = new RecursiveObserver<CalculationGroup, ICalculationBase>(UpdateDataGridViewDataSource, c => c.Children);
         }