Index: Ringtoets/HeightStructures/src/Ringtoets.HeightStructures.Plugin/HeightStructuresPlugin.cs
===================================================================
diff -u -rfcad48d7beb394e1ac15cfe4289a7381e05aa883 -r6949918830314633db5cc8c16bb2188779fffc93
--- Ringtoets/HeightStructures/src/Ringtoets.HeightStructures.Plugin/HeightStructuresPlugin.cs	(.../HeightStructuresPlugin.cs)	(revision fcad48d7beb394e1ac15cfe4289a7381e05aa883)
+++ Ringtoets/HeightStructures/src/Ringtoets.HeightStructures.Plugin/HeightStructuresPlugin.cs	(.../HeightStructuresPlugin.cs)	(revision 6949918830314633db5cc8c16bb2188779fffc93)
@@ -19,7 +19,6 @@
 // Stichting Deltares and remain full property of Stichting Deltares at all times.
 // All rights reserved.
 
-using System.Collections;
 using System.Collections.Generic;
 using System.Drawing;
 using System.Linq;
@@ -381,9 +380,9 @@
             };
         }
 
-        private static IEnumerable GetInputs(HeightStructuresFailureMechanism failureMechanism, IAssessmentSection assessmentSection)
+        private static IEnumerable<object> GetInputs(HeightStructuresFailureMechanism failureMechanism, IAssessmentSection assessmentSection)
         {
-            return new ArrayList
+            return new object[]
             {
                 new FailureMechanismSectionsContext(failureMechanism, assessmentSection),
                 new ForeshoreProfilesContext(failureMechanism.ForeshoreProfiles, failureMechanism, assessmentSection),
@@ -392,9 +391,9 @@
             };
         }
 
-        private static IEnumerable GetOutputs(HeightStructuresFailureMechanism failureMechanism)
+        private static IEnumerable<object> GetOutputs(HeightStructuresFailureMechanism failureMechanism)
         {
-            return new ArrayList
+            return new object[]
             {
                 new HeightStructuresScenariosContext(failureMechanism.CalculationsGroup, failureMechanism),
                 new FailureMechanismSectionResultContext<HeightStructuresFailureMechanismSectionResult>(