Index: Ringtoets/Common/src/Ringtoets.Common.Forms/Factories/RingtoetsStackChartDataFactory.cs
===================================================================
diff -u -rf288f9ccb9ac465f017170a59279909d8431fdc7 -rb2db9fb09d24ef2b0c09ec1d90014c86b4f6ebcb
--- Ringtoets/Common/src/Ringtoets.Common.Forms/Factories/RingtoetsStackChartDataFactory.cs	(.../RingtoetsStackChartDataFactory.cs)	(revision f288f9ccb9ac465f017170a59279909d8431fdc7)
+++ Ringtoets/Common/src/Ringtoets.Common.Forms/Factories/RingtoetsStackChartDataFactory.cs	(.../RingtoetsStackChartDataFactory.cs)	(revision b2db9fb09d24ef2b0c09ec1d90014c86b4f6ebcb)
@@ -24,6 +24,7 @@
 using System.Drawing;
 using System.Linq;
 using Core.Common.Base.Data;
+using Core.Common.Utils.Extensions;
 using Core.Components.Stack.Data;
 using Ringtoets.Common.Forms.Helpers;
 using Ringtoets.Common.Forms.Properties;
@@ -69,7 +70,7 @@
                 illustrationPointControlItems.Select(controlItem => Tuple.Create(controlItem.WindDirectionName,
                                                                                  controlItem.ClosingSituation));
 
-            bool showClosingSituation = !IllustrationPointControlItemHelper.AreClosingSituationsSame(illustrationPointControlItems);
+            bool showClosingSituation = !illustrationPointControlItems.AnyNonDistinct(item => item.ClosingSituation);
 
             foreach (Tuple<string, string> label in labels)
             {
Fisheye: Tag b2db9fb09d24ef2b0c09ec1d90014c86b4f6ebcb refers to a dead (removed) revision in file `Ringtoets/Common/src/Ringtoets.Common.Forms/Helpers/IllustrationPointControlItemHelper.cs'.
Fisheye: No comparison available.  Pass `N' to diff?
Index: Ringtoets/Common/src/Ringtoets.Common.Forms/PropertyClasses/StructuresOutputProperties.cs
===================================================================
diff -u -r5a4e3ce4a8088c1fbb043a029f8081abb4cf1021 -rb2db9fb09d24ef2b0c09ec1d90014c86b4f6ebcb
--- Ringtoets/Common/src/Ringtoets.Common.Forms/PropertyClasses/StructuresOutputProperties.cs	(.../StructuresOutputProperties.cs)	(revision 5a4e3ce4a8088c1fbb043a029f8081abb4cf1021)
+++ Ringtoets/Common/src/Ringtoets.Common.Forms/PropertyClasses/StructuresOutputProperties.cs	(.../StructuresOutputProperties.cs)	(revision b2db9fb09d24ef2b0c09ec1d90014c86b4f6ebcb)
@@ -20,14 +20,14 @@
 // All rights reserved.
 
 using System;
-using System.Collections.Generic;
 using System.ComponentModel;
 using System.Linq;
 using Core.Common.Base.Data;
 using Core.Common.Gui.Attributes;
 using Core.Common.Gui.Converters;
 using Core.Common.Gui.PropertyBag;
 using Core.Common.Utils.Attributes;
+using Core.Common.Utils.Extensions;
 using Ringtoets.Common.Data.IllustrationPoints;
 using Ringtoets.Common.Data.Structures;
 using Ringtoets.Common.Forms.Helpers;
@@ -109,15 +109,15 @@
                     return new TopLevelFaultTreeIllustrationPointProperties[0];
                 }
 
-                IEnumerable<string> listOfClosingSituations = data.GeneralResult
-                                                                  .TopLevelIllustrationPoints
-                                                                  .Select(point => point.ClosingSituation);
+                bool areClosingSituationsSame = data.GeneralResult
+                                                    .TopLevelIllustrationPoints
+                                                    .AnyNonDistinct(p => p.ClosingSituation);
 
                 return data.GeneralResult
                            .TopLevelIllustrationPoints
                            .Select(point =>
                                        new TopLevelFaultTreeIllustrationPointProperties(
-                                           point, listOfClosingSituations)).ToArray();
+                                           point, areClosingSituationsSame)).ToArray();
             }
         }
 
Index: Ringtoets/Common/src/Ringtoets.Common.Forms/PropertyClasses/TopLevelFaultTreeIllustrationPointProperties.cs
===================================================================
diff -u -r5a4e3ce4a8088c1fbb043a029f8081abb4cf1021 -rb2db9fb09d24ef2b0c09ec1d90014c86b4f6ebcb
--- Ringtoets/Common/src/Ringtoets.Common.Forms/PropertyClasses/TopLevelFaultTreeIllustrationPointProperties.cs	(.../TopLevelFaultTreeIllustrationPointProperties.cs)	(revision 5a4e3ce4a8088c1fbb043a029f8081abb4cf1021)
+++ Ringtoets/Common/src/Ringtoets.Common.Forms/PropertyClasses/TopLevelFaultTreeIllustrationPointProperties.cs	(.../TopLevelFaultTreeIllustrationPointProperties.cs)	(revision b2db9fb09d24ef2b0c09ec1d90014c86b4f6ebcb)
@@ -47,21 +47,18 @@
         /// Creates a new instance of <see cref="TopLevelFaultTreeIllustrationPointProperties"/>.
         /// </summary>
         /// <param name="faultTreeData">The data to use for the properties.</param>
-        /// <param name="allClosingSituations">All closing situations in the tree.</param>
-        /// <exception cref="ArgumentNullException">Thrown when any input parameter is <c>null</c>.</exception>
-        public TopLevelFaultTreeIllustrationPointProperties(
-            TopLevelFaultTreeIllustrationPoint faultTreeData, IEnumerable<string> allClosingSituations)
+        /// <param name="areClosingSituationsSame">Defines if all closing situations in the tree are the same.</param>
+        /// <exception cref="ArgumentNullException">Thrown when <paramref name="faultTreeData"/> is <c>null</c>.</exception>
+        public TopLevelFaultTreeIllustrationPointProperties(TopLevelFaultTreeIllustrationPoint faultTreeData,
+                                                            bool areClosingSituationsSame)
         {
             if (faultTreeData == null)
             {
                 throw new ArgumentNullException(nameof(faultTreeData));
             }
-            if (allClosingSituations == null)
-            {
-                throw new ArgumentNullException(nameof(allClosingSituations));
-            }
+
             data = faultTreeData;
-            areClosingSituationsSame = allClosingSituations.Distinct().Count() < 2;
+            this.areClosingSituationsSame = areClosingSituationsSame;
         }
 
         [ResourcesCategory(typeof(Resources), nameof(Resources.Categories_IllustrationPoints))]
Index: Ringtoets/Common/src/Ringtoets.Common.Forms/Ringtoets.Common.Forms.csproj
===================================================================
diff -u -r09657885dd6a95975a8e117f8b8c570cd84a2523 -rb2db9fb09d24ef2b0c09ec1d90014c86b4f6ebcb
--- Ringtoets/Common/src/Ringtoets.Common.Forms/Ringtoets.Common.Forms.csproj	(.../Ringtoets.Common.Forms.csproj)	(revision 09657885dd6a95975a8e117f8b8c570cd84a2523)
+++ Ringtoets/Common/src/Ringtoets.Common.Forms/Ringtoets.Common.Forms.csproj	(.../Ringtoets.Common.Forms.csproj)	(revision b2db9fb09d24ef2b0c09ec1d90014c86b4f6ebcb)
@@ -60,7 +60,6 @@
     <Compile Include="Factories\RingtoetsStackChartDataFactory.cs" />
     <Compile Include="GuiServices\HydraulicBoundaryLocationCalculationGuiService.cs" />
     <Compile Include="GuiServices\IHydraulicBoundaryLocationCalculationGuiService.cs" />
-    <Compile Include="Helpers\IllustrationPointControlItemHelper.cs" />
     <Compile Include="Helpers\SelectableHydraulicBoundaryLocationHelper.cs" />
     <Compile Include="Helpers\SuspendDataGridViewColumnResizes.cs" />
     <Compile Include="Helpers\NamingHelper.cs" />
Index: Ringtoets/Common/src/Ringtoets.Common.Forms/Views/GeneralResultFaultTreeIllustrationPointView.cs
===================================================================
diff -u -ra9b29f48534f9e3e2ab82dce7b81cfe13df515e2 -rb2db9fb09d24ef2b0c09ec1d90014c86b4f6ebcb
--- Ringtoets/Common/src/Ringtoets.Common.Forms/Views/GeneralResultFaultTreeIllustrationPointView.cs	(.../GeneralResultFaultTreeIllustrationPointView.cs)	(revision a9b29f48534f9e3e2ab82dce7b81cfe13df515e2)
+++ Ringtoets/Common/src/Ringtoets.Common.Forms/Views/GeneralResultFaultTreeIllustrationPointView.cs	(.../GeneralResultFaultTreeIllustrationPointView.cs)	(revision b2db9fb09d24ef2b0c09ec1d90014c86b4f6ebcb)
@@ -25,6 +25,7 @@
 using System.Windows.Forms;
 using Core.Common.Base;
 using Core.Common.Controls.Views;
+using Core.Common.Utils.Extensions;
 using Ringtoets.Common.Data.Calculation;
 using Ringtoets.Common.Data.IllustrationPoints;
 using Ringtoets.Common.Forms.PresentationObjects;
@@ -127,9 +128,7 @@
             }
 
             bool areClosingSituationsSame = generalResult.TopLevelIllustrationPoints
-                                                         .Select(point => point.ClosingSituation)
-                                                         .Distinct()
-                                                         .Count() < 2;
+                                                         .AnyNonDistinct(p => p.ClosingSituation);
 
             Selection = new IllustrationPointNodeContext(selection,
                                                          topLevelFaultTreeIllustrationPoint.WindDirection.Name,
Index: Ringtoets/Common/src/Ringtoets.Common.Forms/Views/IllustrationPointsTableControl.cs
===================================================================
diff -u -r304e242143c13dbe48d1c5d36ed3f8721ad85f60 -rb2db9fb09d24ef2b0c09ec1d90014c86b4f6ebcb
--- Ringtoets/Common/src/Ringtoets.Common.Forms/Views/IllustrationPointsTableControl.cs	(.../IllustrationPointsTableControl.cs)	(revision 304e242143c13dbe48d1c5d36ed3f8721ad85f60)
+++ Ringtoets/Common/src/Ringtoets.Common.Forms/Views/IllustrationPointsTableControl.cs	(.../IllustrationPointsTableControl.cs)	(revision b2db9fb09d24ef2b0c09ec1d90014c86b4f6ebcb)
@@ -24,7 +24,7 @@
 using System.Linq;
 using System.Windows.Forms;
 using Core.Common.Controls.Views;
-using Ringtoets.Common.Forms.Helpers;
+using Core.Common.Utils.Extensions;
 using Ringtoets.Common.Forms.Properties;
 
 namespace Ringtoets.Common.Forms.Views
@@ -94,7 +94,7 @@
         {
             if (data != null)
             {
-                if (!IllustrationPointControlItemHelper.AreClosingSituationsSame(data))
+                if (!data.AnyNonDistinct(item => item.ClosingSituation))
                 {
                     illustrationPointsDataGridViewControl.SetColumnVisibility(closingSituationColumnIndex, true);
                     return;
Fisheye: Tag b2db9fb09d24ef2b0c09ec1d90014c86b4f6ebcb refers to a dead (removed) revision in file `Ringtoets/Common/test/Ringtoets.Common.Forms.Test/Helpers/IllustrationPointControlItemHelperTest.cs'.
Fisheye: No comparison available.  Pass `N' to diff?
Index: Ringtoets/Common/test/Ringtoets.Common.Forms.Test/PropertyClasses/TopLevelFaultTreeIllustrationPointPropertiesTest.cs
===================================================================
diff -u -r57b198a3f80256e02b871d8de11c05d9f2dcf311 -rb2db9fb09d24ef2b0c09ec1d90014c86b4f6ebcb
--- Ringtoets/Common/test/Ringtoets.Common.Forms.Test/PropertyClasses/TopLevelFaultTreeIllustrationPointPropertiesTest.cs	(.../TopLevelFaultTreeIllustrationPointPropertiesTest.cs)	(revision 57b198a3f80256e02b871d8de11c05d9f2dcf311)
+++ Ringtoets/Common/test/Ringtoets.Common.Forms.Test/PropertyClasses/TopLevelFaultTreeIllustrationPointPropertiesTest.cs	(.../TopLevelFaultTreeIllustrationPointPropertiesTest.cs)	(revision b2db9fb09d24ef2b0c09ec1d90014c86b4f6ebcb)
@@ -46,38 +46,22 @@
         [Test]
         public void Constructor_FaultTreeNull_ThrowsArgumentNullException()
         {
-            // Call
-            TestDelegate test = () => new TopLevelFaultTreeIllustrationPointProperties(null, new[]
-            {
-                "closing situation"
-            });
-
-            // Assert
-            string paramName = Assert.Throws<ArgumentNullException>(test).ParamName;
-            Assert.AreEqual("faultTreeData", paramName);
-        }
-
-        [Test]
-        public void Constructor_ClosingSituationsNull_ThrowsArgumentNullException()
-        {
             // Setup
-            var topLevel = new TopLevelFaultTreeIllustrationPoint(
-                new WindDirection("N", 5.0),
-                "closing situation",
-                new IllustrationPointNode(new TestFaultTreeIllustrationPoint()));
+            var random = new Random(31);
 
             // Call
-            TestDelegate test = () => new TopLevelFaultTreeIllustrationPointProperties(topLevel, null);
+            TestDelegate test = () => new TopLevelFaultTreeIllustrationPointProperties(null, random.NextBoolean());
 
             // Assert
             string paramName = Assert.Throws<ArgumentNullException>(test).ParamName;
-            Assert.AreEqual("allClosingSituations", paramName);
+            Assert.AreEqual("faultTreeData", paramName);
         }
 
         [Test]
         public void Constructor_FaultTreeIllustrationPoint_CorrectValues()
         {
             // Setup
+            var random = new Random(31);
             var topLevel = new TopLevelFaultTreeIllustrationPoint(
                 new WindDirection("N", 5.0),
                 "closing situation",
@@ -96,10 +80,7 @@
             });
 
             // Call
-            var faultTree = new TopLevelFaultTreeIllustrationPointProperties(topLevel, new[]
-            {
-                "closing situation"
-            });
+            var faultTree = new TopLevelFaultTreeIllustrationPointProperties(topLevel, random.NextBoolean());
 
             // Assert
             Assert.AreEqual("N", faultTree.WindDirection);
@@ -143,10 +124,7 @@
                 new IllustrationPointNode(new TestFaultTreeIllustrationPoint()));
 
             // Call
-            var topLevelFaultTree = new TopLevelFaultTreeIllustrationPointProperties(topLevel, new[]
-            {
-                "closing situation"
-            });
+            var topLevelFaultTree = new TopLevelFaultTreeIllustrationPointProperties(topLevel, true);
 
             // Assert
             const string illustrationPointsCategoryName = "Illustratiepunten";
@@ -207,11 +185,7 @@
                 new IllustrationPointNode(new TestFaultTreeIllustrationPoint()));
 
             // Call
-            var topLevelFaultTree = new TopLevelFaultTreeIllustrationPointProperties(topLevel, new[]
-            {
-                "closing situation",
-                "closing situation 2"
-            });
+            var topLevelFaultTree = new TopLevelFaultTreeIllustrationPointProperties(topLevel, false);
 
             // Assert
             const string illustrationPointsCategoryName = "Illustratiepunten";
@@ -273,12 +247,13 @@
         public void ToString_CorrectValue_ReturnsCorrectString()
         {
             // Setup
+            var random = new Random(31);
             var topLevelFaultTreeIllustrationPoint = new TopLevelFaultTreeIllustrationPoint(
                 new WindDirection("N", 5.0),
                 "closing situation",
                 new IllustrationPointNode(new TestFaultTreeIllustrationPoint()));
 
-            var topLevelFaultTreeProperties = new TopLevelFaultTreeIllustrationPointProperties(topLevelFaultTreeIllustrationPoint, new string[0]);
+            var topLevelFaultTreeProperties = new TopLevelFaultTreeIllustrationPointProperties(topLevelFaultTreeIllustrationPoint, random.NextBoolean());
 
             // Call
             string toString = topLevelFaultTreeProperties.ToString();
Index: Ringtoets/Common/test/Ringtoets.Common.Forms.Test/Ringtoets.Common.Forms.Test.csproj
===================================================================
diff -u -ra1fa1538918813373bcc864f0bce092bf28fd0ce -rb2db9fb09d24ef2b0c09ec1d90014c86b4f6ebcb
--- Ringtoets/Common/test/Ringtoets.Common.Forms.Test/Ringtoets.Common.Forms.Test.csproj	(.../Ringtoets.Common.Forms.Test.csproj)	(revision a1fa1538918813373bcc864f0bce092bf28fd0ce)
+++ Ringtoets/Common/test/Ringtoets.Common.Forms.Test/Ringtoets.Common.Forms.Test.csproj	(.../Ringtoets.Common.Forms.Test.csproj)	(revision b2db9fb09d24ef2b0c09ec1d90014c86b4f6ebcb)
@@ -88,7 +88,6 @@
     <Compile Include="Factories\RingtoetsGraphNodeFactoryTest.cs" />
     <Compile Include="Factories\RingtoetsStackChartDataFactoryTest.cs" />
     <Compile Include="GuiServices\HydraulicBoundaryLocationCalculationGuiServiceTest.cs" />
-    <Compile Include="Helpers\IllustrationPointControlItemHelperTest.cs" />
     <Compile Include="Helpers\NamingHelperTest.cs" />
     <Compile Include="Helpers\ProbabilityFormattingHelperTest.cs" />
     <Compile Include="Helpers\SelectableHydraulicBoundaryLocationHelperTest.cs" />
Index: Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Forms/PropertyClasses/DikeHeightOutputProperties.cs
===================================================================
diff -u -rf3bce3ba367d1cc9148424e214d42fd5792d49aa -rb2db9fb09d24ef2b0c09ec1d90014c86b4f6ebcb
--- Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Forms/PropertyClasses/DikeHeightOutputProperties.cs	(.../DikeHeightOutputProperties.cs)	(revision f3bce3ba367d1cc9148424e214d42fd5792d49aa)
+++ Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Forms/PropertyClasses/DikeHeightOutputProperties.cs	(.../DikeHeightOutputProperties.cs)	(revision b2db9fb09d24ef2b0c09ec1d90014c86b4f6ebcb)
@@ -20,7 +20,6 @@
 // All rights reserved.
 
 using System;
-using System.Collections.Generic;
 using System.ComponentModel;
 using System.Linq;
 using Core.Common.Base.Data;
@@ -29,6 +28,7 @@
 using Core.Common.Gui.PropertyBag;
 using Core.Common.Utils;
 using Core.Common.Utils.Attributes;
+using Core.Common.Utils.Extensions;
 using Ringtoets.Common.Data.Hydraulics;
 using Ringtoets.Common.Data.IllustrationPoints;
 using Ringtoets.Common.Forms.PropertyClasses;
@@ -189,15 +189,15 @@
                     return new TopLevelFaultTreeIllustrationPointProperties[0];
                 }
 
-                IEnumerable<string> listOfClosingSituations = data.GeneralResult
-                                                                  .TopLevelIllustrationPoints
-                                                                  .Select(point => point.ClosingSituation);
+                bool areClosingSituationsSame = data.GeneralResult
+                                                    .TopLevelIllustrationPoints
+                                                    .AnyNonDistinct(p => p.ClosingSituation);
 
                 return data.GeneralResult
                            .TopLevelIllustrationPoints
                            .Select(point =>
                                        new TopLevelFaultTreeIllustrationPointProperties(
-                                           point, listOfClosingSituations)).ToArray();
+                                           point, areClosingSituationsSame)).ToArray();
             }
         }
 
Index: Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Forms/PropertyClasses/OvertoppingOutputProperties.cs
===================================================================
diff -u -rf3bce3ba367d1cc9148424e214d42fd5792d49aa -rb2db9fb09d24ef2b0c09ec1d90014c86b4f6ebcb
--- Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Forms/PropertyClasses/OvertoppingOutputProperties.cs	(.../OvertoppingOutputProperties.cs)	(revision f3bce3ba367d1cc9148424e214d42fd5792d49aa)
+++ Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Forms/PropertyClasses/OvertoppingOutputProperties.cs	(.../OvertoppingOutputProperties.cs)	(revision b2db9fb09d24ef2b0c09ec1d90014c86b4f6ebcb)
@@ -20,14 +20,14 @@
 // All rights reserved.
 
 using System;
-using System.Collections.Generic;
 using System.ComponentModel;
 using System.Linq;
 using Core.Common.Base.Data;
 using Core.Common.Gui.Attributes;
 using Core.Common.Gui.Converters;
 using Core.Common.Gui.PropertyBag;
 using Core.Common.Utils.Attributes;
+using Core.Common.Utils.Extensions;
 using Ringtoets.Common.Data.IllustrationPoints;
 using Ringtoets.Common.Forms.Helpers;
 using Ringtoets.Common.Forms.PropertyClasses;
@@ -196,15 +196,15 @@
                     return new TopLevelFaultTreeIllustrationPointProperties[0];
                 }
 
-                IEnumerable<string> listOfClosingSituations = data.GeneralResult
-                                                                  .TopLevelIllustrationPoints
-                                                                  .Select(point => point.ClosingSituation);
+                bool areClosingSituationsSame = data.GeneralResult
+                                                    .TopLevelIllustrationPoints
+                                                    .AnyNonDistinct(p => p.ClosingSituation);
 
                 return data.GeneralResult
                            .TopLevelIllustrationPoints
                            .Select(point =>
                                        new TopLevelFaultTreeIllustrationPointProperties(
-                                           point, listOfClosingSituations)).ToArray();
+                                           point, areClosingSituationsSame)).ToArray();
             }
         }
 
Index: Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Forms/PropertyClasses/OvertoppingRateOutputProperties.cs
===================================================================
diff -u -rf3bce3ba367d1cc9148424e214d42fd5792d49aa -rb2db9fb09d24ef2b0c09ec1d90014c86b4f6ebcb
--- Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Forms/PropertyClasses/OvertoppingRateOutputProperties.cs	(.../OvertoppingRateOutputProperties.cs)	(revision f3bce3ba367d1cc9148424e214d42fd5792d49aa)
+++ Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Forms/PropertyClasses/OvertoppingRateOutputProperties.cs	(.../OvertoppingRateOutputProperties.cs)	(revision b2db9fb09d24ef2b0c09ec1d90014c86b4f6ebcb)
@@ -20,7 +20,6 @@
 // All rights reserved.
 
 using System;
-using System.Collections.Generic;
 using System.ComponentModel;
 using System.Linq;
 using Core.Common.Base.Data;
@@ -29,6 +28,7 @@
 using Core.Common.Gui.PropertyBag;
 using Core.Common.Utils;
 using Core.Common.Utils.Attributes;
+using Core.Common.Utils.Extensions;
 using Ringtoets.Common.Data.Hydraulics;
 using Ringtoets.Common.Data.IllustrationPoints;
 using Ringtoets.Common.Forms.PropertyClasses;
@@ -189,15 +189,15 @@
                     return new TopLevelFaultTreeIllustrationPointProperties[0];
                 }
 
-                IEnumerable<string> listOfClosingSituations = data.GeneralResult
-                                                                  .TopLevelIllustrationPoints
-                                                                  .Select(point => point.ClosingSituation);
+                bool areClosingSituationsSame = data.GeneralResult
+                                                    .TopLevelIllustrationPoints
+                                                    .AnyNonDistinct(p => p.ClosingSituation);
 
                 return data.GeneralResult
                            .TopLevelIllustrationPoints
                            .Select(point =>
                                        new TopLevelFaultTreeIllustrationPointProperties(
-                                           point, listOfClosingSituations)).ToArray();
+                                           point, areClosingSituationsSame)).ToArray();
             }
         }
 
Index: Ringtoets/Integration/src/Ringtoets.Integration.Plugin/RingtoetsPlugin.cs
===================================================================
diff -u -r712e51eb76a5659f285837dceb4c1c761eca4f4b -rb2db9fb09d24ef2b0c09ec1d90014c86b4f6ebcb
--- Ringtoets/Integration/src/Ringtoets.Integration.Plugin/RingtoetsPlugin.cs	(.../RingtoetsPlugin.cs)	(revision 712e51eb76a5659f285837dceb4c1c761eca4f4b)
+++ Ringtoets/Integration/src/Ringtoets.Integration.Plugin/RingtoetsPlugin.cs	(.../RingtoetsPlugin.cs)	(revision b2db9fb09d24ef2b0c09ec1d90014c86b4f6ebcb)
@@ -332,8 +332,7 @@
             };
             yield return new PropertyInfo<SelectedTopLevelFaultTreeIllustrationPoint, TopLevelFaultTreeIllustrationPointProperties>
             {
-                CreateInstance = point => new TopLevelFaultTreeIllustrationPointProperties(point.TopLevelFaultTreeIllustrationPoint,
-                                                                                           point.ClosingSituations)
+                CreateInstance = CreateTopLevelFaultTreeIllustrationPointProperties
             };
             yield return new PropertyInfo<IllustrationPointNodeContext, IllustrationPointProperties>
             {
@@ -882,6 +881,12 @@
                                                    context.ClosingSituation);
         }
 
+        private static TopLevelFaultTreeIllustrationPointProperties CreateTopLevelFaultTreeIllustrationPointProperties(SelectedTopLevelFaultTreeIllustrationPoint point)
+        {
+            return new TopLevelFaultTreeIllustrationPointProperties(point.TopLevelFaultTreeIllustrationPoint,
+                                                                    point.ClosingSituations.AnyNonDistinct(cs => cs));
+        }
+
         #endregion
 
         #region ViewInfos