Index: Ringtoets/Integration/test/Ringtoets.Integration.Plugin.Test/TreeNodeInfos/HydraulicBoundaryDatabaseContextTreeNodeInfoTest.cs
===================================================================
diff -u -rf8f82b94a5b6a3a47b2b32fc1a8ab704b33f356b -r5169b12fc5f885c17e1c6eb6ae459c5d46adfb68
--- Ringtoets/Integration/test/Ringtoets.Integration.Plugin.Test/TreeNodeInfos/HydraulicBoundaryDatabaseContextTreeNodeInfoTest.cs	(.../HydraulicBoundaryDatabaseContextTreeNodeInfoTest.cs)	(revision f8f82b94a5b6a3a47b2b32fc1a8ab704b33f356b)
+++ Ringtoets/Integration/test/Ringtoets.Integration.Plugin.Test/TreeNodeInfos/HydraulicBoundaryDatabaseContextTreeNodeInfoTest.cs	(.../HydraulicBoundaryDatabaseContextTreeNodeInfoTest.cs)	(revision 5169b12fc5f885c17e1c6eb6ae459c5d46adfb68)
@@ -499,22 +499,22 @@
 
             string currentFilePath = assessmentSection.HydraulicBoundaryDatabase.FilePath;
             string currentVersion = assessmentSection.HydraulicBoundaryDatabase.Version;
-            IEnumerable<HydraulicBoundaryLocation> currentHydraulicBoundaryLocations = assessmentSection.HydraulicBoundaryDatabase.Locations.ToList();
-            IEnumerable<HydraulicBoundaryLocationCalculation> currentWaterLevelCalculationsForFactorizedSignalingNorm = assessmentSection.WaterLevelCalculationsForFactorizedSignalingNorm.ToList();
-            IEnumerable<HydraulicBoundaryLocationCalculation> currentWaterLevelCalculationsForSignalingNorm = assessmentSection.WaterLevelCalculationsForSignalingNorm.ToList();
-            IEnumerable<HydraulicBoundaryLocationCalculation> currentWaterLevelCalculationsForLowerLimitNorm = assessmentSection.WaterLevelCalculationsForLowerLimitNorm.ToList();
-            IEnumerable<HydraulicBoundaryLocationCalculation> currentWaterLevelCalculationsForFactorizedLowerLimitNorm = assessmentSection.WaterLevelCalculationsForFactorizedLowerLimitNorm.ToList();
-            IEnumerable<HydraulicBoundaryLocationCalculation> currentWaveHeightCalculationsForFactorizedSignalingNorm = assessmentSection.WaveHeightCalculationsForFactorizedSignalingNorm.ToList();
-            IEnumerable<HydraulicBoundaryLocationCalculation> currentWaveHeightCalculationsForSignalingNorm = assessmentSection.WaveHeightCalculationsForSignalingNorm.ToList();
-            IEnumerable<HydraulicBoundaryLocationCalculation> currentWaveHeightCalculationsForLowerLimitNorm = assessmentSection.WaveHeightCalculationsForLowerLimitNorm.ToList();
-            IEnumerable<HydraulicBoundaryLocationCalculation> currentWaveHeightCalculationsForFactorizedLowerLimitNorm = assessmentSection.WaveHeightCalculationsForFactorizedLowerLimitNorm.ToList();
-            IEnumerable<HydraulicBoundaryLocation> currentGrassCoverErosionOutwardsLocations = grassCoverErosionOutwardsFailureMechanism.HydraulicBoundaryLocations.ToList();
-            IEnumerable<HydraulicBoundaryLocationCalculation> currentWaterLevelCalculationsForMechanismSpecificFactorizedSignalingNorm = grassCoverErosionOutwardsFailureMechanism.WaterLevelCalculationsForMechanismSpecificFactorizedSignalingNorm.ToList();
-            IEnumerable<HydraulicBoundaryLocationCalculation> currentWaterLevelCalculationsForMechanismSpecificSignalingNorm = grassCoverErosionOutwardsFailureMechanism.WaterLevelCalculationsForMechanismSpecificSignalingNorm.ToList();
-            IEnumerable<HydraulicBoundaryLocationCalculation> currentWaterLevelCalculationsForMechanismSpecificLowerLimitNorm = grassCoverErosionOutwardsFailureMechanism.WaterLevelCalculationsForMechanismSpecificLowerLimitNorm.ToList();
-            IEnumerable<HydraulicBoundaryLocationCalculation> currentWaveHeightCalculationsForMechanismSpecificFactorizedSignalingNorm = grassCoverErosionOutwardsFailureMechanism.WaveHeightCalculationsForMechanismSpecificFactorizedSignalingNorm.ToList();
-            IEnumerable<HydraulicBoundaryLocationCalculation> currentWaveHeightCalculationsForMechanismSpecificSignalingNorm = grassCoverErosionOutwardsFailureMechanism.WaveHeightCalculationsForMechanismSpecificSignalingNorm.ToList();
-            IEnumerable<HydraulicBoundaryLocationCalculation> currentWaveHeightCalculationsForMechanismSpecificLowerLimitNorm = grassCoverErosionOutwardsFailureMechanism.WaveHeightCalculationsForMechanismSpecificLowerLimitNorm.ToList();
+            IEnumerable<HydraulicBoundaryLocation> currentHydraulicBoundaryLocations = assessmentSection.HydraulicBoundaryDatabase.Locations.ToArray();
+            IEnumerable<HydraulicBoundaryLocationCalculation> currentWaterLevelCalculationsForFactorizedSignalingNorm = assessmentSection.WaterLevelCalculationsForFactorizedSignalingNorm.ToArray();
+            IEnumerable<HydraulicBoundaryLocationCalculation> currentWaterLevelCalculationsForSignalingNorm = assessmentSection.WaterLevelCalculationsForSignalingNorm.ToArray();
+            IEnumerable<HydraulicBoundaryLocationCalculation> currentWaterLevelCalculationsForLowerLimitNorm = assessmentSection.WaterLevelCalculationsForLowerLimitNorm.ToArray();
+            IEnumerable<HydraulicBoundaryLocationCalculation> currentWaterLevelCalculationsForFactorizedLowerLimitNorm = assessmentSection.WaterLevelCalculationsForFactorizedLowerLimitNorm.ToArray();
+            IEnumerable<HydraulicBoundaryLocationCalculation> currentWaveHeightCalculationsForFactorizedSignalingNorm = assessmentSection.WaveHeightCalculationsForFactorizedSignalingNorm.ToArray();
+            IEnumerable<HydraulicBoundaryLocationCalculation> currentWaveHeightCalculationsForSignalingNorm = assessmentSection.WaveHeightCalculationsForSignalingNorm.ToArray();
+            IEnumerable<HydraulicBoundaryLocationCalculation> currentWaveHeightCalculationsForLowerLimitNorm = assessmentSection.WaveHeightCalculationsForLowerLimitNorm.ToArray();
+            IEnumerable<HydraulicBoundaryLocationCalculation> currentWaveHeightCalculationsForFactorizedLowerLimitNorm = assessmentSection.WaveHeightCalculationsForFactorizedLowerLimitNorm.ToArray();
+            IEnumerable<HydraulicBoundaryLocation> currentGrassCoverErosionOutwardsLocations = grassCoverErosionOutwardsFailureMechanism.HydraulicBoundaryLocations.ToArray();
+            IEnumerable<HydraulicBoundaryLocationCalculation> currentWaterLevelCalculationsForMechanismSpecificFactorizedSignalingNorm = grassCoverErosionOutwardsFailureMechanism.WaterLevelCalculationsForMechanismSpecificFactorizedSignalingNorm.ToArray();
+            IEnumerable<HydraulicBoundaryLocationCalculation> currentWaterLevelCalculationsForMechanismSpecificSignalingNorm = grassCoverErosionOutwardsFailureMechanism.WaterLevelCalculationsForMechanismSpecificSignalingNorm.ToArray();
+            IEnumerable<HydraulicBoundaryLocationCalculation> currentWaterLevelCalculationsForMechanismSpecificLowerLimitNorm = grassCoverErosionOutwardsFailureMechanism.WaterLevelCalculationsForMechanismSpecificLowerLimitNorm.ToArray();
+            IEnumerable<HydraulicBoundaryLocationCalculation> currentWaveHeightCalculationsForMechanismSpecificFactorizedSignalingNorm = grassCoverErosionOutwardsFailureMechanism.WaveHeightCalculationsForMechanismSpecificFactorizedSignalingNorm.ToArray();
+            IEnumerable<HydraulicBoundaryLocationCalculation> currentWaveHeightCalculationsForMechanismSpecificSignalingNorm = grassCoverErosionOutwardsFailureMechanism.WaveHeightCalculationsForMechanismSpecificSignalingNorm.ToArray();
+            IEnumerable<HydraulicBoundaryLocationCalculation> currentWaveHeightCalculationsForMechanismSpecificLowerLimitNorm = grassCoverErosionOutwardsFailureMechanism.WaveHeightCalculationsForMechanismSpecificLowerLimitNorm.ToArray();
 
             using (var treeViewControl = new TreeViewControl())
             using (var plugin = new RingtoetsPlugin())