Index: Riskeer/Common/src/Riskeer.Common.Forms/Views/AdoptableFailureMechanismResultView.cs
===================================================================
diff -u -rd9119b8f4a74fb2a6f3ececeaea94f0e58513c52 -r954f6e62776bccea14993f4a7fdce328e052fce5
--- Riskeer/Common/src/Riskeer.Common.Forms/Views/AdoptableFailureMechanismResultView.cs	(.../AdoptableFailureMechanismResultView.cs)	(revision d9119b8f4a74fb2a6f3ececeaea94f0e58513c52)
+++ Riskeer/Common/src/Riskeer.Common.Forms/Views/AdoptableFailureMechanismResultView.cs	(.../AdoptableFailureMechanismResultView.cs)	(revision 954f6e62776bccea14993f4a7fdce328e052fce5)
@@ -40,7 +40,7 @@
     /// <typeparam name="TCalculationInput">The type of calculation input.</typeparam>
     public abstract class AdoptableFailureMechanismResultView<TFailureMechanism, TCalculationScenario, TCalculationInput>
         : FailureMechanismResultView<AdoptableFailureMechanismSectionResult, AdoptableFailureMechanismSectionResultRow, TFailureMechanism>
-        where TFailureMechanism : IFailureMechanism<AdoptableFailureMechanismSectionResult>, ICalculatableFailureMechanism
+        where TFailureMechanism : class, IFailureMechanism<AdoptableFailureMechanismSectionResult>, ICalculatableFailureMechanism
         where TCalculationScenario : ICalculationScenario, ICalculation<TCalculationInput>
         where TCalculationInput : ICalculationInput
     {
Index: Riskeer/Common/src/Riskeer.Common.Forms/Views/CalculationsView.cs
===================================================================
diff -u -rd9119b8f4a74fb2a6f3ececeaea94f0e58513c52 -r954f6e62776bccea14993f4a7fdce328e052fce5
--- Riskeer/Common/src/Riskeer.Common.Forms/Views/CalculationsView.cs	(.../CalculationsView.cs)	(revision d9119b8f4a74fb2a6f3ececeaea94f0e58513c52)
+++ Riskeer/Common/src/Riskeer.Common.Forms/Views/CalculationsView.cs	(.../CalculationsView.cs)	(revision 954f6e62776bccea14993f4a7fdce328e052fce5)
@@ -49,7 +49,7 @@
         where TCalculation : class, ICalculation<TCalculationInput>
         where TCalculationRow : CalculationRow<TCalculation>
         where TCalculationInput : class, ICalculationInput
-        where TFailureMechanism : ICalculatableFailureMechanism
+        where TFailureMechanism : class, ICalculatableFailureMechanism
     {
         private int nameColumnIndex = -1;
         private int selectableHydraulicBoundaryLocationColumnIndex = -1;
Index: Riskeer/Common/src/Riskeer.Common.Forms/Views/FailureMechanismResultView.cs
===================================================================
diff -u -rd9119b8f4a74fb2a6f3ececeaea94f0e58513c52 -r954f6e62776bccea14993f4a7fdce328e052fce5
--- Riskeer/Common/src/Riskeer.Common.Forms/Views/FailureMechanismResultView.cs	(.../FailureMechanismResultView.cs)	(revision d9119b8f4a74fb2a6f3ececeaea94f0e58513c52)
+++ Riskeer/Common/src/Riskeer.Common.Forms/Views/FailureMechanismResultView.cs	(.../FailureMechanismResultView.cs)	(revision 954f6e62776bccea14993f4a7fdce328e052fce5)
@@ -48,7 +48,7 @@
     public abstract partial class FailureMechanismResultView<TSectionResult, TSectionResultRow, TFailureMechanism> : UserControl, IView
         where TSectionResult : FailureMechanismSectionResult
         where TSectionResultRow : FailureMechanismSectionResultRow<TSectionResult>
-        where TFailureMechanism : IFailureMechanism<TSectionResult>
+        where TFailureMechanism : class, IFailureMechanism<TSectionResult>
     {
         private readonly IObservableEnumerable<TSectionResult> failureMechanismSectionResults;
         private readonly Func<TFailureMechanism, IAssessmentSection, FailureMechanismAssemblyResultWrapper> performFailureMechanismAssemblyFunc;
Index: Riskeer/Common/src/Riskeer.Common.Forms/Views/NonAdoptableFailureMechanismResultView.cs
===================================================================
diff -u -rd9119b8f4a74fb2a6f3ececeaea94f0e58513c52 -r954f6e62776bccea14993f4a7fdce328e052fce5
--- Riskeer/Common/src/Riskeer.Common.Forms/Views/NonAdoptableFailureMechanismResultView.cs	(.../NonAdoptableFailureMechanismResultView.cs)	(revision d9119b8f4a74fb2a6f3ececeaea94f0e58513c52)
+++ Riskeer/Common/src/Riskeer.Common.Forms/Views/NonAdoptableFailureMechanismResultView.cs	(.../NonAdoptableFailureMechanismResultView.cs)	(revision 954f6e62776bccea14993f4a7fdce328e052fce5)
@@ -34,7 +34,7 @@
     /// </summary>
     /// <typeparam name="TFailureMechanism">The type of failure mechanism.</typeparam>
     public class NonAdoptableFailureMechanismResultView<TFailureMechanism> : FailureMechanismResultView<NonAdoptableFailureMechanismSectionResult, NonAdoptableFailureMechanismSectionResultRow, TFailureMechanism>
-        where TFailureMechanism : IFailureMechanism<NonAdoptableFailureMechanismSectionResult>
+        where TFailureMechanism : class, IFailureMechanism<NonAdoptableFailureMechanismSectionResult>
     {
         private const int initialFailureMechanismResultTypeIndex = 2;
         private const int initialFailureMechanismResultSectionProbabilityIndex = 3;
Index: Riskeer/Common/src/Riskeer.Common.Forms/Views/ScenariosView.cs
===================================================================
diff -u -rd9119b8f4a74fb2a6f3ececeaea94f0e58513c52 -r954f6e62776bccea14993f4a7fdce328e052fce5
--- Riskeer/Common/src/Riskeer.Common.Forms/Views/ScenariosView.cs	(.../ScenariosView.cs)	(revision d9119b8f4a74fb2a6f3ececeaea94f0e58513c52)
+++ Riskeer/Common/src/Riskeer.Common.Forms/Views/ScenariosView.cs	(.../ScenariosView.cs)	(revision 954f6e62776bccea14993f4a7fdce328e052fce5)
@@ -44,7 +44,7 @@
         where TCalculationScenario : class, ICalculationScenario
         where TCalculationInput : class, ICalculationInput
         where TScenarioRow : ScenarioRow<TCalculationScenario>
-        where TFailureMechanism : ICalculatableFailureMechanism
+        where TFailureMechanism : class, ICalculatableFailureMechanism
     {
         private readonly TFailureMechanism failureMechanism;
 
Index: Riskeer/Common/src/Riskeer.Common.Forms/Views/SelectableRow.cs
===================================================================
diff -u -rd9119b8f4a74fb2a6f3ececeaea94f0e58513c52 -r954f6e62776bccea14993f4a7fdce328e052fce5
--- Riskeer/Common/src/Riskeer.Common.Forms/Views/SelectableRow.cs	(.../SelectableRow.cs)	(revision d9119b8f4a74fb2a6f3ececeaea94f0e58513c52)
+++ Riskeer/Common/src/Riskeer.Common.Forms/Views/SelectableRow.cs	(.../SelectableRow.cs)	(revision 954f6e62776bccea14993f4a7fdce328e052fce5)
@@ -26,7 +26,7 @@
     /// <summary>
     /// This class represents a row of <see cref="T"/> that can be selected.
     /// </summary>
-    public class SelectableRow<T>
+    public class SelectableRow<T> where T : class
     {
         /// <summary>
         /// Creates a new instance of <see cref="SelectableRow{T}"/>.
Index: Riskeer/Common/src/Riskeer.Common.Forms/Views/StructuresFailureMechanismResultView.cs
===================================================================
diff -u -rd9119b8f4a74fb2a6f3ececeaea94f0e58513c52 -r954f6e62776bccea14993f4a7fdce328e052fce5
--- Riskeer/Common/src/Riskeer.Common.Forms/Views/StructuresFailureMechanismResultView.cs	(.../StructuresFailureMechanismResultView.cs)	(revision d9119b8f4a74fb2a6f3ececeaea94f0e58513c52)
+++ Riskeer/Common/src/Riskeer.Common.Forms/Views/StructuresFailureMechanismResultView.cs	(.../StructuresFailureMechanismResultView.cs)	(revision 954f6e62776bccea14993f4a7fdce328e052fce5)
@@ -39,7 +39,7 @@
     /// <typeparam name="TStructuresInput">The type of input.</typeparam>
     public class StructuresFailureMechanismResultView<TFailureMechanism, TStructuresInput> : AdoptableFailureMechanismResultView<
         TFailureMechanism, StructuresCalculationScenario<TStructuresInput>, TStructuresInput>
-        where TFailureMechanism : IFailureMechanism<AdoptableFailureMechanismSectionResult>, ICalculatableFailureMechanism, IFailureMechanism
+        where TFailureMechanism : class, IFailureMechanism<AdoptableFailureMechanismSectionResult>, ICalculatableFailureMechanism, IFailureMechanism
         where TStructuresInput : IStructuresCalculationInput<StructureBase>, new()
     {
         /// <summary>
Index: Riskeer/Common/src/Riskeer.Common.IO/SoilProfile/SoilProfileWrapper.cs
===================================================================
diff -u -rd9119b8f4a74fb2a6f3ececeaea94f0e58513c52 -r954f6e62776bccea14993f4a7fdce328e052fce5
--- Riskeer/Common/src/Riskeer.Common.IO/SoilProfile/SoilProfileWrapper.cs	(.../SoilProfileWrapper.cs)	(revision d9119b8f4a74fb2a6f3ececeaea94f0e58513c52)
+++ Riskeer/Common/src/Riskeer.Common.IO/SoilProfile/SoilProfileWrapper.cs	(.../SoilProfileWrapper.cs)	(revision 954f6e62776bccea14993f4a7fdce328e052fce5)
@@ -29,7 +29,7 @@
     /// </summary>
     /// <typeparam name="TSoilProfile">The type of soil profile to wrap.</typeparam>
     public class SoilProfileWrapper<TSoilProfile>
-        where TSoilProfile : ISoilProfile
+        where TSoilProfile : class, ISoilProfile
     {
         /// <summary>
         /// Creates a new instance of <see cref="SoilProfileWrapper{T}"/>.
Index: Riskeer/Integration/src/Riskeer.Integration.Forms/Views/StandAloneFailureMechanismView.cs
===================================================================
diff -u -rd9119b8f4a74fb2a6f3ececeaea94f0e58513c52 -r954f6e62776bccea14993f4a7fdce328e052fce5
--- Riskeer/Integration/src/Riskeer.Integration.Forms/Views/StandAloneFailureMechanismView.cs	(.../StandAloneFailureMechanismView.cs)	(revision d9119b8f4a74fb2a6f3ececeaea94f0e58513c52)
+++ Riskeer/Integration/src/Riskeer.Integration.Forms/Views/StandAloneFailureMechanismView.cs	(.../StandAloneFailureMechanismView.cs)	(revision 954f6e62776bccea14993f4a7fdce328e052fce5)
@@ -37,7 +37,7 @@
     /// This class is a view showing map data for a stand alone failure mechanism.
     /// </summary>
     public partial class StandAloneFailureMechanismView<TFailureMechanism, TSectionResult> : UserControl, IMapView
-        where TFailureMechanism : IFailureMechanism<TSectionResult>
+        where TFailureMechanism : class, IFailureMechanism<TSectionResult>
         where TSectionResult : FailureMechanismSectionResult
     {
         private readonly Func<TSectionResult, FailureMechanismSectionAssemblyResult> performAssemblyFunc;
Index: Riskeer/Integration/src/Riskeer.Integration.IO/Factories/ExportableAssessmentSectionFactory.cs
===================================================================
diff -u -rd9119b8f4a74fb2a6f3ececeaea94f0e58513c52 -r954f6e62776bccea14993f4a7fdce328e052fce5
--- Riskeer/Integration/src/Riskeer.Integration.IO/Factories/ExportableAssessmentSectionFactory.cs	(.../ExportableAssessmentSectionFactory.cs)	(revision d9119b8f4a74fb2a6f3ececeaea94f0e58513c52)
+++ Riskeer/Integration/src/Riskeer.Integration.IO/Factories/ExportableAssessmentSectionFactory.cs	(.../ExportableAssessmentSectionFactory.cs)	(revision 954f6e62776bccea14993f4a7fdce328e052fce5)
@@ -275,7 +275,7 @@
             TFailureMechanism failureMechanism, IAssessmentSection assessmentSection,
             Func<TFailureMechanism, IAssessmentSection, FailureMechanismAssemblyResultWrapper> assembleFailureMechanismFunc,
             Func<TSectionResult, TFailureMechanism, IAssessmentSection, FailureMechanismSectionAssemblyResultWrapper> assembleFailureMechanismSectionFunc)
-            where TFailureMechanism : IFailureMechanism<TSectionResult>
+            where TFailureMechanism : class, IFailureMechanism<TSectionResult>
             where TSectionResult : FailureMechanismSectionResult
         {
             if (failureMechanism.InAssembly)