Index: Ringtoets/Common/src/Ringtoets.Common.Data/FailureMechanism/FailureMechanismSectionCollection.cs
===================================================================
diff -u
--- Ringtoets/Common/src/Ringtoets.Common.Data/FailureMechanism/FailureMechanismSectionCollection.cs	(revision 0)
+++ Ringtoets/Common/src/Ringtoets.Common.Data/FailureMechanism/FailureMechanismSectionCollection.cs	(revision 29590bf9ec9ced87e1fc0e124466238c4151def8)
@@ -0,0 +1,133 @@
+// Copyright (C) Stichting Deltares 2017. All rights reserved.
+//
+// This file is part of Ringtoets.
+//
+// Ringtoets 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 System.Collections;
+using System.Collections.Generic;
+using System.Linq;
+using Core.Common.Base;
+using Core.Common.Util;
+using Ringtoets.Common.Data.Properties;
+
+namespace Ringtoets.Common.Data.FailureMechanism
+{
+    public class FailureMechanismSectionCollection : Observable, IObservableEnumerable<FailureMechanismSection>
+    {
+        private readonly List<FailureMechanismSection> sections = new List<FailureMechanismSection>();
+
+        /// <summary>
+        /// Clears the imported items in the collection and the <see cref="SourcePath"/>.
+        /// </summary>
+        public void Clear()
+        {
+            sections.Clear();
+        }
+
+        /// <summary>
+        /// Adds all <see cref="FailureMechanismSection"/> originating from a source file.
+        /// </summary>
+        /// <param name="failureMechanismSections">The collection of <see cref="FailureMechanismSection"/> to add</param>
+        /// <param name="filePath">The path to the source file.</param>
+        /// <exception cref="ArgumentNullException">Thrown when any input argument is <c>null</c>.</exception>
+        /// <exception cref="ArgumentException">Thrown when:
+        /// <list type="bullet">
+        /// <item><paramref name="failureMechanismSections"/> contains <c>null</c>.</item>
+        /// <item><paramref name="filePath"/> is not a valid file path.</item>
+        /// </list>
+        /// </exception>
+        public void AddRange(IEnumerable<FailureMechanismSection> failureMechanismSections,
+                             string filePath)
+        {
+            if (failureMechanismSections == null)
+            {
+                throw new ArgumentNullException(nameof(failureMechanismSections));
+            }
+
+            if (filePath == null)
+            {
+                throw new ArgumentNullException(nameof(filePath));
+            }
+
+            if (!IOUtils.IsValidFilePath(filePath) && filePath.Length > 0)
+            {
+                throw new ArgumentException($@"'{filePath}' is not a valid file path.", nameof(filePath));
+            }
+
+            if (failureMechanismSections.Contains(null))
+            {
+                throw new ArgumentException(@"Collection cannot contain null.", nameof(failureMechanismSections));
+            }
+
+            List<FailureMechanismSection> sourceCollection = failureMechanismSections.ToList();
+            if (!sections.Any())
+            {
+                FailureMechanismSection firstSection = sourceCollection.First();
+                sections.Add(firstSection);
+                sourceCollection.Remove(firstSection);
+            }
+
+            foreach (FailureMechanismSection section in sourceCollection)
+            {
+                InsertSectionWhileMaintainingConnectivityOrder(section);
+            }
+
+            SourcePath = filePath;
+        }
+
+        /// <summary>
+        /// Gets the last known file path from which the <see cref="FailureMechanismSection"/> were imported.
+        /// </summary>
+        /// <returns>The path where the elements originate
+        /// from, or <c>null</c> if the collection is cleared.</returns>
+        public string SourcePath { get; private set; }
+
+        /// <summary>
+        /// Inserts the section to the collection while maintaining connectivity
+        /// order (neighboring <see cref="FailureMechanismSection"/> have same end points).
+        /// </summary>
+        /// <param name="sectionToInsert">The new section.</param>
+        /// <exception cref="ArgumentException">Thrown when <paramref name="sectionToInsert"/> cannot
+        /// be connected to elements already defined in this collection.</exception>
+        private void InsertSectionWhileMaintainingConnectivityOrder(FailureMechanismSection sectionToInsert)
+        {
+            if (sections.Last().EndPoint.Equals(sectionToInsert.StartPoint))
+            {
+                sections.Add(sectionToInsert);
+            }
+            else
+            {
+                string message = string.Format(Resources.BaseFailureMechanism_AddSection_Section_0_must_connect_to_existing_sections,
+                                               sectionToInsert.Name);
+                throw new ArgumentException(message, nameof(sectionToInsert));
+            }
+        }
+
+        public IEnumerator<FailureMechanismSection> GetEnumerator()
+        {
+            return sections.GetEnumerator();
+        }
+
+        IEnumerator IEnumerable.GetEnumerator()
+        {
+            return GetEnumerator();
+        }
+    }
+}
\ No newline at end of file
Index: Ringtoets/Common/src/Ringtoets.Common.Data/Ringtoets.Common.Data.csproj
===================================================================
diff -u -r35cea5bdef5fedc2034ca0df05994b1930f7d46a -r29590bf9ec9ced87e1fc0e124466238c4151def8
--- Ringtoets/Common/src/Ringtoets.Common.Data/Ringtoets.Common.Data.csproj	(.../Ringtoets.Common.Data.csproj)	(revision 35cea5bdef5fedc2034ca0df05994b1930f7d46a)
+++ Ringtoets/Common/src/Ringtoets.Common.Data/Ringtoets.Common.Data.csproj	(.../Ringtoets.Common.Data.csproj)	(revision 29590bf9ec9ced87e1fc0e124466238c4151def8)
@@ -48,6 +48,7 @@
     <Compile Include="Exceptions\IllustrationPointConversionException.cs" />
     <Compile Include="Exceptions\MechanismSurfaceLineException.cs" />
     <Compile Include="FailureMechanism\FailureMechanismCategoryType.cs" />
+    <Compile Include="FailureMechanism\FailureMechanismSectionCollection.cs" />
     <Compile Include="Helpers\SoilLayerDataHelper.cs" />
     <Compile Include="Hydraulics\CalculationConvergence.cs" />
     <Compile Include="Hydraulics\HydraulicBoundaryDatabase.cs" />