Index: Ringtoets/HeightStructures/src/Ringtoets.HeightStructures.Service/HeightStructuresDataSynchronizationService.cs
===================================================================
diff -u -rc1594afa56f02899bd122fc4fd4ccf4d76b236b7 -r20e9bfea15dfe132ee137283a9f24bc4c413ce4a
--- Ringtoets/HeightStructures/src/Ringtoets.HeightStructures.Service/HeightStructuresDataSynchronizationService.cs	(.../HeightStructuresDataSynchronizationService.cs)	(revision c1594afa56f02899bd122fc4fd4ccf4d76b236b7)
+++ Ringtoets/HeightStructures/src/Ringtoets.HeightStructures.Service/HeightStructuresDataSynchronizationService.cs	(.../HeightStructuresDataSynchronizationService.cs)	(revision 20e9bfea15dfe132ee137283a9f24bc4c413ce4a)
@@ -103,7 +103,7 @@
                                                       .Concat(failureMechanism.SectionResults)
                                                       .Concat(failureMechanism.CalculationsGroup.GetAllChildrenRecursive())
                                                       .Concat(failureMechanism.ForeshoreProfiles)
-                                                      .Concat(failureMechanism.HeightStructuresCollection)
+                                                      .Concat(failureMechanism.HeightStructures)
                                                       .ToArray();
 
             failureMechanism.ClearAllSections();
@@ -115,8 +115,8 @@
             failureMechanism.ForeshoreProfiles.Clear();
             changedObjects.Add(failureMechanism.ForeshoreProfiles);
 
-            failureMechanism.HeightStructuresCollection.Clear();
-            changedObjects.Add(failureMechanism.HeightStructuresCollection);
+            failureMechanism.HeightStructures.Clear();
+            changedObjects.Add(failureMechanism.HeightStructures);
 
             return new ClearResults(changedObjects, removedObjects);
         }
@@ -155,8 +155,8 @@
                 changedObservables.Add(result);
             }
 
-            failureMechanism.HeightStructuresCollection.Remove(structure);
-            changedObservables.Add(failureMechanism.HeightStructuresCollection);
+            failureMechanism.HeightStructures.Remove(structure);
+            changedObservables.Add(failureMechanism.HeightStructures);
 
             return changedObservables;
         }