Index: Riskeer/Piping/src/Riskeer.Piping.Forms/PropertyClasses/ProbabilisticPipingInputContextProperties.cs
===================================================================
diff -u -rd13335ccfafd4f811f875d9f119cc07f57193d96 -r6d05936e57d31b407f13e1bda04ed2dca591b18a
--- Riskeer/Piping/src/Riskeer.Piping.Forms/PropertyClasses/ProbabilisticPipingInputContextProperties.cs	(.../ProbabilisticPipingInputContextProperties.cs)	(revision d13335ccfafd4f811f875d9f119cc07f57193d96)
+++ Riskeer/Piping/src/Riskeer.Piping.Forms/PropertyClasses/ProbabilisticPipingInputContextProperties.cs	(.../ProbabilisticPipingInputContextProperties.cs)	(revision 6d05936e57d31b407f13e1bda04ed2dca591b18a)
@@ -425,11 +425,11 @@
         [ResourcesCategory(typeof(RiskeerCommonFormsResources), nameof(RiskeerCommonFormsResources.Output))]
         [ResourcesDisplayName(typeof(Resources), nameof(RiskeerCommonFormsResources.SectionLength_DisplayName))]
         [ResourcesDescription(typeof(Resources), nameof(RiskeerCommonFormsResources.SectionLength_Description))]
-        public string SectionLength
+        public RoundedDouble SectionLength
         {
             get
             {
-                return data.WrappedData.SectionName;
+                return data.WrappedData.SectionLength;
             }
         }
 
Index: Riskeer/Piping/test/Riskeer.Piping.Forms.Test/PropertyClasses/ProbabilisticPipingInputContextPropertiesTest.cs
===================================================================
diff -u
--- Riskeer/Piping/test/Riskeer.Piping.Forms.Test/PropertyClasses/ProbabilisticPipingInputContextPropertiesTest.cs	(revision 0)
+++ Riskeer/Piping/test/Riskeer.Piping.Forms.Test/PropertyClasses/ProbabilisticPipingInputContextPropertiesTest.cs	(revision 6d05936e57d31b407f13e1bda04ed2dca591b18a)
@@ -0,0 +1,72 @@
+// Copyright (C) Stichting Deltares 2019. All rights reserved.
+//
+// This file is part of Riskeer.
+//
+// Riskeer is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <http://www.gnu.org/licenses/>.
+//
+// All names, logos, and references to "Deltares" are registered trademarks of
+// Stichting Deltares and remain full property of Stichting Deltares at all times.
+// All rights reserved.
+
+using System;
+using NUnit.Framework;
+using Rhino.Mocks;
+using Riskeer.Common.Data.TestUtil;
+using Riskeer.Common.Forms.PropertyClasses;
+using Riskeer.Piping.Forms.PropertyClasses;
+
+namespace Riskeer.Piping.Forms.Test.PropertyClasses
+{
+    [TestFixture]
+    class ProbabilisticPipingInputContextPropertiesTest
+    {
+        private const int selectedHydraulicBoundaryLocationPropertyIndex = 1;
+        private const int dampingFactorExitPropertyIndex = 2;
+        private const int phreaticLevelExitPropertyIndex = 3;
+        private const int piezometricHeadExitPropertyIndex = 4;
+
+        private const int surfaceLinePropertyIndex = 5;
+        private const int stochasticSoilModelPropertyIndex = 6;
+        private const int stochasticSoilProfilePropertyIndex = 7;
+        private const int entryPointLPropertyIndex = 8;
+        private const int exitPointLPropertyIndex = 9;
+        private const int seepageLengthPropertyIndex = 10;
+        private const int thicknessCoverageLayerPropertyIndex = 11;
+        private const int effectiveThicknessCoverageLayerPropertyIndex = 12;
+        private const int thicknessAquiferLayerPropertyIndex = 13;
+        private const int darcyPermeabilityPropertyIndex = 14;
+        private const int diameter70PropertyIndex = 15;
+        private const int saturatedVolumicWeightOfCoverageLayerPropertyIndex = 16;
+
+        private const int sectionNamePropertyIndex = 17;
+        private const int sectionLengthPropertyIndex = 18;
+
+        [Test]
+        public void Constructor_DataNull_ThrowArgumentNullException()
+        {
+            // Setup
+            var mocks = new MockRepository();
+            var handler = mocks.Stub<IObservablePropertyChangeHandler>();
+            mocks.ReplayAll();
+
+            // Call
+            void Call() => new ProbabilisticPipingInputContextProperties(null, AssessmentSectionTestHelper.GetTestAssessmentLevel, handler);
+
+            // Assert
+            var exception = Assert.Throws<ArgumentNullException>(Call);
+            Assert.AreEqual("data", exception.ParamName);
+            mocks.VerifyAll();
+        }
+    }
+}