Index: Riskeer/Common/src/Riskeer.Common.Forms/PropertyClasses/DesignWaterLevelCalculationsProperties.cs
===================================================================
diff -u -rc61152c80323d74e6f848f5617c33ddeacd5e089 -r2d9d5de4880ea9d1341b820174515aa07ad45752
--- Riskeer/Common/src/Riskeer.Common.Forms/PropertyClasses/DesignWaterLevelCalculationsProperties.cs	(.../DesignWaterLevelCalculationsProperties.cs)	(revision c61152c80323d74e6f848f5617c33ddeacd5e089)
+++ Riskeer/Common/src/Riskeer.Common.Forms/PropertyClasses/DesignWaterLevelCalculationsProperties.cs	(.../DesignWaterLevelCalculationsProperties.cs)	(revision 2d9d5de4880ea9d1341b820174515aa07ad45752)
@@ -33,13 +33,13 @@
     /// ViewModel of a collection of <see cref="HydraulicBoundaryLocationCalculation"/> with
     /// a design water level calculation result for properties panel.
     /// </summary>
-    public class DesignWaterLevelCalculationsProperties : HydraulicBoundaryLocationCalculationsProperties
+    public abstract class DesignWaterLevelCalculationsProperties : HydraulicBoundaryLocationCalculationsProperties
     {
         /// <inheritdoc />
         /// <summary>
         /// Creates a new instance of <see cref="DesignWaterLevelCalculationsProperties"/>.
         /// </summary>
-        public DesignWaterLevelCalculationsProperties(IObservableEnumerable<HydraulicBoundaryLocationCalculation> hydraulicBoundaryLocationCalculations)
+        protected DesignWaterLevelCalculationsProperties(IObservableEnumerable<HydraulicBoundaryLocationCalculation> hydraulicBoundaryLocationCalculations)
             : base(hydraulicBoundaryLocationCalculations) {}
 
         [TypeConverter(typeof(ExpandableArrayConverter))]
Index: Riskeer/Common/src/Riskeer.Common.Forms/PropertyClasses/WaveHeightCalculationsProperties.cs
===================================================================
diff -u -r628f2f0fb1146e8b4bce994f9d81971adf6791b7 -r2d9d5de4880ea9d1341b820174515aa07ad45752
--- Riskeer/Common/src/Riskeer.Common.Forms/PropertyClasses/WaveHeightCalculationsProperties.cs	(.../WaveHeightCalculationsProperties.cs)	(revision 628f2f0fb1146e8b4bce994f9d81971adf6791b7)
+++ Riskeer/Common/src/Riskeer.Common.Forms/PropertyClasses/WaveHeightCalculationsProperties.cs	(.../WaveHeightCalculationsProperties.cs)	(revision 2d9d5de4880ea9d1341b820174515aa07ad45752)
@@ -33,13 +33,13 @@
     /// ViewModel of a collection of <see cref="HydraulicBoundaryLocationCalculation"/> with
     /// a wave height calculation result for properties panel.
     /// </summary>
-    public class WaveHeightCalculationsProperties : HydraulicBoundaryLocationCalculationsProperties
+    public abstract class WaveHeightCalculationsProperties : HydraulicBoundaryLocationCalculationsProperties
     {
         /// <inheritdoc />
         /// <summary>
         /// Creates a new instance of <see cref="WaveHeightCalculationsProperties"/>.
         /// </summary>
-        public WaveHeightCalculationsProperties(IObservableEnumerable<HydraulicBoundaryLocationCalculation> hydraulicBoundaryLocationCalculations)
+        protected WaveHeightCalculationsProperties(IObservableEnumerable<HydraulicBoundaryLocationCalculation> hydraulicBoundaryLocationCalculations)
             : base(hydraulicBoundaryLocationCalculations) {}
 
         [TypeConverter(typeof(ExpandableArrayConverter))]
Index: Riskeer/Common/test/Riskeer.Common.Forms.Test/PropertyClasses/DesignWaterLevelCalculationsPropertiesTest.cs
===================================================================
diff -u -r1cbbb2310c2dd1270825700be09b51c5f321cfd2 -r2d9d5de4880ea9d1341b820174515aa07ad45752
--- Riskeer/Common/test/Riskeer.Common.Forms.Test/PropertyClasses/DesignWaterLevelCalculationsPropertiesTest.cs	(.../DesignWaterLevelCalculationsPropertiesTest.cs)	(revision 1cbbb2310c2dd1270825700be09b51c5f321cfd2)
+++ Riskeer/Common/test/Riskeer.Common.Forms.Test/PropertyClasses/DesignWaterLevelCalculationsPropertiesTest.cs	(.../DesignWaterLevelCalculationsPropertiesTest.cs)	(revision 2d9d5de4880ea9d1341b820174515aa07ad45752)
@@ -43,7 +43,7 @@
             var hydraulicBoundaryLocationCalculations = new ObservableList<HydraulicBoundaryLocationCalculation>();
 
             // Call
-            var properties = new DesignWaterLevelCalculationsProperties(hydraulicBoundaryLocationCalculations);
+            var properties = new TestDesignWaterLevelCalculationsProperties(hydraulicBoundaryLocationCalculations);
 
             // Assert
             Assert.IsInstanceOf<HydraulicBoundaryLocationCalculationsProperties>(properties);
@@ -57,7 +57,7 @@
         public void Constructor_Always_PropertiesHaveExpectedAttributesValues()
         {
             // Call
-            var properties = new DesignWaterLevelCalculationsProperties(new ObservableList<HydraulicBoundaryLocationCalculation>());
+            var properties = new TestDesignWaterLevelCalculationsProperties(new ObservableList<HydraulicBoundaryLocationCalculation>());
 
             // Assert
             PropertyDescriptorCollection dynamicProperties = PropertiesTestHelper.GetAllVisiblePropertyDescriptors(properties);
@@ -78,7 +78,7 @@
             var hydraulicBoundaryLocationCalculation = new HydraulicBoundaryLocationCalculation(new TestHydraulicBoundaryLocation());
 
             // Call
-            var properties = new DesignWaterLevelCalculationsProperties(new ObservableList<HydraulicBoundaryLocationCalculation>
+            var properties = new TestDesignWaterLevelCalculationsProperties(new ObservableList<HydraulicBoundaryLocationCalculation>
             {
                 hydraulicBoundaryLocationCalculation
             });
@@ -87,5 +87,11 @@
             Assert.AreEqual(1, properties.Calculations.Length);
             Assert.AreSame(hydraulicBoundaryLocationCalculation, properties.Calculations[0].Data);
         }
+
+        private class TestDesignWaterLevelCalculationsProperties : DesignWaterLevelCalculationsProperties
+        {
+            public TestDesignWaterLevelCalculationsProperties(IObservableEnumerable<HydraulicBoundaryLocationCalculation> hydraulicBoundaryLocationCalculations)
+                : base(hydraulicBoundaryLocationCalculations) {}
+        }
     }
 }
\ No newline at end of file
Index: Riskeer/Common/test/Riskeer.Common.Forms.Test/PropertyClasses/WaveHeightCalculationsPropertiesTest.cs
===================================================================
diff -u -r1cbbb2310c2dd1270825700be09b51c5f321cfd2 -r2d9d5de4880ea9d1341b820174515aa07ad45752
--- Riskeer/Common/test/Riskeer.Common.Forms.Test/PropertyClasses/WaveHeightCalculationsPropertiesTest.cs	(.../WaveHeightCalculationsPropertiesTest.cs)	(revision 1cbbb2310c2dd1270825700be09b51c5f321cfd2)
+++ Riskeer/Common/test/Riskeer.Common.Forms.Test/PropertyClasses/WaveHeightCalculationsPropertiesTest.cs	(.../WaveHeightCalculationsPropertiesTest.cs)	(revision 2d9d5de4880ea9d1341b820174515aa07ad45752)
@@ -43,7 +43,7 @@
             var hydraulicBoundaryLocationCalculations = new ObservableList<HydraulicBoundaryLocationCalculation>();
 
             // Call
-            var properties = new WaveHeightCalculationsProperties(hydraulicBoundaryLocationCalculations);
+            var properties = new TestWaveHeightCalculationsProperties(hydraulicBoundaryLocationCalculations);
 
             // Assert
             Assert.IsInstanceOf<HydraulicBoundaryLocationCalculationsProperties>(properties);
@@ -57,7 +57,7 @@
         public void Constructor_Always_PropertiesHaveExpectedAttributesValues()
         {
             // Call
-            var properties = new WaveHeightCalculationsProperties(new ObservableList<HydraulicBoundaryLocationCalculation>());
+            var properties = new TestWaveHeightCalculationsProperties(new ObservableList<HydraulicBoundaryLocationCalculation>());
 
             // Assert
             PropertyDescriptorCollection dynamicProperties = PropertiesTestHelper.GetAllVisiblePropertyDescriptors(properties);
@@ -78,7 +78,7 @@
             var hydraulicBoundaryLocationCalculation = new HydraulicBoundaryLocationCalculation(new TestHydraulicBoundaryLocation());
 
             // Call
-            var properties = new WaveHeightCalculationsProperties(new ObservableList<HydraulicBoundaryLocationCalculation>
+            var properties = new TestWaveHeightCalculationsProperties(new ObservableList<HydraulicBoundaryLocationCalculation>
             {
                 hydraulicBoundaryLocationCalculation
             });
@@ -87,5 +87,11 @@
             Assert.AreEqual(1, properties.Calculations.Length);
             Assert.AreSame(hydraulicBoundaryLocationCalculation, properties.Calculations[0].Data);
         }
+
+        private class TestWaveHeightCalculationsProperties : WaveHeightCalculationsProperties
+        {
+            public TestWaveHeightCalculationsProperties(IObservableEnumerable<HydraulicBoundaryLocationCalculation> hydraulicBoundaryLocationCalculations)
+                : base(hydraulicBoundaryLocationCalculations) {}
+        }
     }
 }
\ No newline at end of file