Index: Riskeer/Integration/src/Riskeer.Integration.Data/Assembly/AssessmentSectionAssemblyFactory.cs
===================================================================
diff -u -r19e6d4ac96b28f25e8f2a5c0f164118dd0a05c0d -r0c9054a7f1dfd78f554eacd9a356d59c3878079c
--- Riskeer/Integration/src/Riskeer.Integration.Data/Assembly/AssessmentSectionAssemblyFactory.cs	(.../AssessmentSectionAssemblyFactory.cs)	(revision 19e6d4ac96b28f25e8f2a5c0f164118dd0a05c0d)
+++ Riskeer/Integration/src/Riskeer.Integration.Data/Assembly/AssessmentSectionAssemblyFactory.cs	(.../AssessmentSectionAssemblyFactory.cs)	(revision 0c9054a7f1dfd78f554eacd9a356d59c3878079c)
@@ -108,7 +108,7 @@
                     AssemblyToolKernelFactory.Instance);
 
                 Dictionary<IFailureMechanism, int> failureMechanismsToAssemble = assessmentSection.GetFailureMechanisms()
-                                                                                                  .Concat<IFailureMechanism>(assessmentSection.SpecificFailureMechanisms)
+                                                                                                  .Concat(assessmentSection.SpecificFailureMechanisms)
                                                                                                   .Where(fm => fm.InAssembly)
                                                                                                   .Select((fm, i) => new
                                                                                                   {
Index: Riskeer/Integration/src/Riskeer.Integration.Service/RiskeerDataSynchronizationService.cs
===================================================================
diff -u -r19e6d4ac96b28f25e8f2a5c0f164118dd0a05c0d -r0c9054a7f1dfd78f554eacd9a356d59c3878079c
--- Riskeer/Integration/src/Riskeer.Integration.Service/RiskeerDataSynchronizationService.cs	(.../RiskeerDataSynchronizationService.cs)	(revision 19e6d4ac96b28f25e8f2a5c0f164118dd0a05c0d)
+++ Riskeer/Integration/src/Riskeer.Integration.Service/RiskeerDataSynchronizationService.cs	(.../RiskeerDataSynchronizationService.cs)	(revision 0c9054a7f1dfd78f554eacd9a356d59c3878079c)
@@ -496,7 +496,7 @@
             var removedObjects = new List<object>();
 
             foreach (IFailureMechanism failureMechanism in assessmentSection.GetFailureMechanisms()
-                                                                            .Concat<IFailureMechanism>(assessmentSection.SpecificFailureMechanisms))
+                                                                            .Concat(assessmentSection.SpecificFailureMechanisms))
             {
                 ClearResults results = GetClearResultsForFailureMechanism(failureMechanism);
 
Index: Riskeer/Integration/test/Riskeer.Integration.Data.Test/Assembly/AssessmentSectionAssemblyFactoryTest.cs
===================================================================
diff -u -rdbda180fabc98288e55d846b150f2f959279d98a -r0c9054a7f1dfd78f554eacd9a356d59c3878079c
--- Riskeer/Integration/test/Riskeer.Integration.Data.Test/Assembly/AssessmentSectionAssemblyFactoryTest.cs	(.../AssessmentSectionAssemblyFactoryTest.cs)	(revision dbda180fabc98288e55d846b150f2f959279d98a)
+++ Riskeer/Integration/test/Riskeer.Integration.Data.Test/Assembly/AssessmentSectionAssemblyFactoryTest.cs	(.../AssessmentSectionAssemblyFactoryTest.cs)	(revision 0c9054a7f1dfd78f554eacd9a356d59c3878079c)
@@ -186,7 +186,7 @@
                 AssessmentSectionAssemblyCalculatorStub assessmentSectionAssemblyCalculator = calculatorFactory.LastCreatedAssessmentSectionAssemblyCalculator;
                 IEnumerable<CombinedAssemblyFailureMechanismSection>[] actualInput = assessmentSectionAssemblyCalculator.CombinedFailureMechanismSectionsInput.ToArray();
                 IEnumerable<CombinedAssemblyFailureMechanismSection>[] expectedInput = CombinedAssemblyFailureMechanismSectionFactory.CreateInput(
-                    assessmentSection, assessmentSection.GetFailureMechanisms().Concat<IFailureMechanism>(assessmentSection.SpecificFailureMechanisms)).ToArray();
+                    assessmentSection, assessmentSection.GetFailureMechanisms().Concat(assessmentSection.SpecificFailureMechanisms)).ToArray();
                 Assert.AreEqual(expectedInput.Length, actualInput.Length);
 
                 for (var i = 0; i < expectedInput.Length; i++)
@@ -229,7 +229,7 @@
 
                 // Assert
                 Dictionary<IFailureMechanism, int> failureMechanisms = assessmentSection.GetFailureMechanisms()
-                                                                                        .Concat<IFailureMechanism>(assessmentSection.SpecificFailureMechanisms)
+                                                                                        .Concat(assessmentSection.SpecificFailureMechanisms)
                                                                                         .Where(fm => fm.InAssembly)
                                                                                         .Select((fm, i) => new
                                                                                         {
@@ -312,7 +312,6 @@
             AssessmentSection assessmentSection = CreateAssessmentSectionContainingFailureMechanismsWithInAssemblyTrue();
 
             assessmentSection.GetFailureMechanisms()
-                             .Cast<IFailureMechanism>()
                              .Concat(assessmentSection.SpecificFailureMechanisms)
                              .ForEachElementDo(fp => fp.InAssembly = random.NextBoolean());
 
Index: Riskeer/Integration/test/Riskeer.Integration.Data.Test/Assembly/CombinedAssemblyFailureMechanismSectionFactoryTest.cs
===================================================================
diff -u -r19e6d4ac96b28f25e8f2a5c0f164118dd0a05c0d -r0c9054a7f1dfd78f554eacd9a356d59c3878079c
--- Riskeer/Integration/test/Riskeer.Integration.Data.Test/Assembly/CombinedAssemblyFailureMechanismSectionFactoryTest.cs	(.../CombinedAssemblyFailureMechanismSectionFactoryTest.cs)	(revision 19e6d4ac96b28f25e8f2a5c0f164118dd0a05c0d)
+++ Riskeer/Integration/test/Riskeer.Integration.Data.Test/Assembly/CombinedAssemblyFailureMechanismSectionFactoryTest.cs	(.../CombinedAssemblyFailureMechanismSectionFactoryTest.cs)	(revision 0c9054a7f1dfd78f554eacd9a356d59c3878079c)
@@ -80,7 +80,7 @@
 
                 // Call
                 IEnumerable<IEnumerable<CombinedAssemblyFailureMechanismSection>> inputs = CombinedAssemblyFailureMechanismSectionFactory.CreateInput(
-                    assessmentSection, assessmentSection.GetFailureMechanisms().Concat<IFailureMechanism>(assessmentSection.SpecificFailureMechanisms));
+                    assessmentSection, assessmentSection.GetFailureMechanisms().Concat(assessmentSection.SpecificFailureMechanisms));
 
                 // Assert
                 int expectedNrOfGeneralSectionResults = assessmentSection.GetFailureMechanisms().Count();
@@ -149,7 +149,7 @@
 
                 // Call
                 IEnumerable<IEnumerable<CombinedAssemblyFailureMechanismSection>> inputs = CombinedAssemblyFailureMechanismSectionFactory.CreateInput(
-                    assessmentSection, assessmentSection.GetFailureMechanisms().Concat<IFailureMechanism>(assessmentSection.SpecificFailureMechanisms));
+                    assessmentSection, assessmentSection.GetFailureMechanisms().Concat(assessmentSection.SpecificFailureMechanisms));
 
                 // Assert
                 int expectedNrOfGeneralSectionResults = assessmentSection.GetFailureMechanisms().Count();
Index: Riskeer/Integration/test/Riskeer.Integration.Data.Test/Assembly/CombinedFailureMechanismSectionAssemblyResultFactoryTest.cs
===================================================================
diff -u -rdbda180fabc98288e55d846b150f2f959279d98a -r0c9054a7f1dfd78f554eacd9a356d59c3878079c
--- Riskeer/Integration/test/Riskeer.Integration.Data.Test/Assembly/CombinedFailureMechanismSectionAssemblyResultFactoryTest.cs	(.../CombinedFailureMechanismSectionAssemblyResultFactoryTest.cs)	(revision dbda180fabc98288e55d846b150f2f959279d98a)
+++ Riskeer/Integration/test/Riskeer.Integration.Data.Test/Assembly/CombinedFailureMechanismSectionAssemblyResultFactoryTest.cs	(.../CombinedFailureMechanismSectionAssemblyResultFactoryTest.cs)	(revision 0c9054a7f1dfd78f554eacd9a356d59c3878079c)
@@ -86,7 +86,7 @@
             var assessmentSection = new AssessmentSection(random.NextEnumValue<AssessmentSectionComposition>());
             assessmentSection.SpecificFailureMechanisms.Add(new SpecificFailureMechanism());
             Dictionary<IFailureMechanism, int> failureMechanisms = assessmentSection.GetFailureMechanisms()
-                                                                                    .Concat<IFailureMechanism>(assessmentSection.SpecificFailureMechanisms)
+                                                                                    .Concat(assessmentSection.SpecificFailureMechanisms)
                                                                                     .Where(fm => fm.InAssembly)
                                                                                     .Select((fm, i) => new
                                                                                     {
@@ -146,7 +146,7 @@
             var assessmentSection = new AssessmentSection(random.NextEnumValue<AssessmentSectionComposition>());
             assessmentSection.SpecificFailureMechanisms.Add(new SpecificFailureMechanism());
             Dictionary<IFailureMechanism, int> failureMechanisms = assessmentSection.GetFailureMechanisms()
-                                                                                    .Concat<IFailureMechanism>(assessmentSection.SpecificFailureMechanisms)
+                                                                                    .Concat(assessmentSection.SpecificFailureMechanisms)
                                                                                     .Where(fm => fm.InAssembly)
                                                                                     .Select((fm, i) => new
                                                                                     {
Index: Riskeer/Integration/test/Riskeer.Integration.Data.TestUtil/CombinedFailureMechanismSectionAssemblyTestFactory.cs
===================================================================
diff -u -r19e6d4ac96b28f25e8f2a5c0f164118dd0a05c0d -r0c9054a7f1dfd78f554eacd9a356d59c3878079c
--- Riskeer/Integration/test/Riskeer.Integration.Data.TestUtil/CombinedFailureMechanismSectionAssemblyTestFactory.cs	(.../CombinedFailureMechanismSectionAssemblyTestFactory.cs)	(revision 19e6d4ac96b28f25e8f2a5c0f164118dd0a05c0d)
+++ Riskeer/Integration/test/Riskeer.Integration.Data.TestUtil/CombinedFailureMechanismSectionAssemblyTestFactory.cs	(.../CombinedFailureMechanismSectionAssemblyTestFactory.cs)	(revision 0c9054a7f1dfd78f554eacd9a356d59c3878079c)
@@ -24,7 +24,6 @@
 using Core.Common.TestUtil;
 using Riskeer.AssemblyTool.Data;
 using Riskeer.Common.Data.AssessmentSection;
-using Riskeer.Common.Data.FailureMechanism;
 
 namespace Riskeer.Integration.Data.TestUtil
 {
@@ -46,7 +45,7 @@
             return new CombinedFailureMechanismSectionAssembly(
                 new CombinedAssemblyFailureMechanismSection(random.NextDouble(), random.NextDouble(), random.NextEnumValue<FailureMechanismSectionAssemblyGroup>()),
                 assessmentSection.GetFailureMechanisms()
-                                 .Concat<IFailureMechanism>(assessmentSection.SpecificFailureMechanisms)
+                                 .Concat(assessmentSection.SpecificFailureMechanisms)
                                  .Where(fm => fm.InAssembly)
                                  .Select(fm => random.NextEnumValue<FailureMechanismSectionAssemblyGroup>())
                                  .ToArray());
Index: Riskeer/Integration/test/Riskeer.Integration.IO.Test/Factories/ExportableAssessmentSectionFactoryTest.cs
===================================================================
diff -u -rf2935589aa89c211c41e339da4ceaa359fc400e1 -r0c9054a7f1dfd78f554eacd9a356d59c3878079c
--- Riskeer/Integration/test/Riskeer.Integration.IO.Test/Factories/ExportableAssessmentSectionFactoryTest.cs	(.../ExportableAssessmentSectionFactoryTest.cs)	(revision f2935589aa89c211c41e339da4ceaa359fc400e1)
+++ Riskeer/Integration/test/Riskeer.Integration.IO.Test/Factories/ExportableAssessmentSectionFactoryTest.cs	(.../ExportableAssessmentSectionFactoryTest.cs)	(revision 0c9054a7f1dfd78f554eacd9a356d59c3878079c)
@@ -157,7 +157,7 @@
             FailureMechanismTestHelper.AddSections(assessmentSection.SpecificFailureMechanisms.Last(), random.Next(1, 10));
 
             foreach (IFailureMechanism failureMechanism in assessmentSection.GetFailureMechanisms()
-                                                                            .Concat<IFailureMechanism>(assessmentSection.SpecificFailureMechanisms))
+                                                                            .Concat(assessmentSection.SpecificFailureMechanisms))
             {
                 failureMechanism.InAssembly = false;
             }