Index: Core/Components/src/Core.Components.Gis.IO/Readers/PointShapeFileReader.cs
===================================================================
diff -u -raf83c5308c30a462589f45eecd5ba0dfac0cda00 -r512788fc0ce981fa155451f30ef31c2ffe4bf2ce
--- Core/Components/src/Core.Components.Gis.IO/Readers/PointShapeFileReader.cs	(.../PointShapeFileReader.cs)	(revision af83c5308c30a462589f45eecd5ba0dfac0cda00)
+++ Core/Components/src/Core.Components.Gis.IO/Readers/PointShapeFileReader.cs	(.../PointShapeFileReader.cs)	(revision 512788fc0ce981fa155451f30ef31c2ffe4bf2ce)
@@ -21,6 +21,7 @@
 
 using System;
 using System.Collections.Generic;
+using System.IO;
 using System.Linq;
 using Core.Common.Base.Geometry;
 using Core.Common.IO.Exceptions;
@@ -30,7 +31,6 @@
 using Core.Components.Gis.Geometries;
 using DotSpatial.Data;
 using DotSpatial.Topology;
-
 using CoreCommonUtilsResources = Core.Common.Utils.Properties.Resources;
 using GisIOResources = Core.Components.Gis.IO.Properties.Resources;
 
@@ -52,6 +52,7 @@
         /// <list type="bullet">
         /// <item><paramref name="filePath"/> points to a file that doesn't exist.</item>
         /// <item>The shapefile has non-point geometries in it.</item>
+        /// <item>An unexpected error occurred when reading the shapefile.</item>
         /// </list>
         /// </exception>
         public PointShapeFileReader(string filePath) : base(filePath)
@@ -66,6 +67,11 @@
                     .Build(GisIOResources.PointShapeFileReader_File_contains_geometries_not_points);
                 throw new CriticalFileReadException(message, e);
             }
+            catch (IOException exception)
+            {
+                var message = new FileReaderErrorMessageBuilder(filePath).Build(CoreCommonUtilsResources.Error_General_IO_ErrorMessage);
+                throw new CriticalFileReadException(message, exception);
+            }
         }
 
         public override FeatureBasedMapData ReadShapeFile(string name = null)
Index: Core/Components/src/Core.Components.Gis.IO/Readers/PolygonShapeFileReader.cs
===================================================================
diff -u -r024fbf441138ee549e8da563fccdfbdc51ded385 -r512788fc0ce981fa155451f30ef31c2ffe4bf2ce
--- Core/Components/src/Core.Components.Gis.IO/Readers/PolygonShapeFileReader.cs	(.../PolygonShapeFileReader.cs)	(revision 024fbf441138ee549e8da563fccdfbdc51ded385)
+++ Core/Components/src/Core.Components.Gis.IO/Readers/PolygonShapeFileReader.cs	(.../PolygonShapeFileReader.cs)	(revision 512788fc0ce981fa155451f30ef31c2ffe4bf2ce)
@@ -21,18 +21,16 @@
 
 using System;
 using System.Collections.Generic;
+using System.IO;
 using System.Linq;
-
 using Core.Common.Base.Geometry;
 using Core.Common.IO.Exceptions;
 using Core.Common.Utils.Builders;
 using Core.Components.Gis.Data;
 using Core.Components.Gis.Features;
 using Core.Components.Gis.Geometries;
-
 using DotSpatial.Data;
 using DotSpatial.Topology;
-
 using CoreCommonUtilsResources = Core.Common.Utils.Properties.Resources;
 using GisIOResources = Core.Components.Gis.IO.Properties.Resources;
 
@@ -54,6 +52,7 @@
         /// <list type="bullet">
         /// <item><paramref name="filePath"/> points to a file that doesn't exist.</item>
         /// <item>The shapefile has non-polygon geometries in it.</item>
+        /// <item>An unexpected error occurred when reading the shapefile.</item>
         /// </list>
         /// </exception>
         public PolygonShapeFileReader(string filePath) : base(filePath)
@@ -68,6 +67,11 @@
                     .Build(GisIOResources.PointShapeFileReader_File_contains_geometries_not_polygons);
                 throw new CriticalFileReadException(message, e);
             }
+            catch (IOException exception)
+            {
+                var message = new FileReaderErrorMessageBuilder(filePath).Build(CoreCommonUtilsResources.Error_General_IO_ErrorMessage);
+                throw new CriticalFileReadException(message, exception);
+            }
         }
 
         public override FeatureBasedMapData ReadLine(string name = null)
@@ -145,7 +149,7 @@
 
             for (int i = 0; i < polygonFeature.BasicGeometry.NumGeometries; i++)
             {
-                var basicPolygon = (IBasicPolygon)polygonFeature.BasicGeometry.GetBasicGeometryN(i);
+                var basicPolygon = (IBasicPolygon) polygonFeature.BasicGeometry.GetBasicGeometryN(i);
 
                 MapGeometry mapGeometry = new MapGeometry(GetMapGeometryPointCollections(basicPolygon));
                 geometries.Add(mapGeometry);
Index: Core/Components/src/Core.Components.Gis.IO/Readers/PolylineShapeFileReader.cs
===================================================================
diff -u -rc909efdf6275b926fd146b4abad96682a9ff0f0f -r512788fc0ce981fa155451f30ef31c2ffe4bf2ce
--- Core/Components/src/Core.Components.Gis.IO/Readers/PolylineShapeFileReader.cs	(.../PolylineShapeFileReader.cs)	(revision c909efdf6275b926fd146b4abad96682a9ff0f0f)
+++ Core/Components/src/Core.Components.Gis.IO/Readers/PolylineShapeFileReader.cs	(.../PolylineShapeFileReader.cs)	(revision 512788fc0ce981fa155451f30ef31c2ffe4bf2ce)
@@ -52,6 +52,7 @@
         /// <list type="bullet">
         /// <item><paramref name="shapeFilePath"/> points to a file that doesn't exist.</item>
         /// <item>The shapefile has non-line geometries in it.</item>
+        /// <item>An unexpected error occurred when reading the shapefile.</item>
         /// </list>
         /// </exception>
         public PolylineShapeFileReader(string shapeFilePath) : base(shapeFilePath)
Index: Core/Components/test/Core.Components.Gis.IO.Test/Readers/PointShapeFileReaderTest.cs
===================================================================
diff -u -r151bab16a7ebc1bffc0621ab56c6dc219db1e90f -r512788fc0ce981fa155451f30ef31c2ffe4bf2ce
--- Core/Components/test/Core.Components.Gis.IO.Test/Readers/PointShapeFileReaderTest.cs	(.../PointShapeFileReaderTest.cs)	(revision 151bab16a7ebc1bffc0621ab56c6dc219db1e90f)
+++ Core/Components/test/Core.Components.Gis.IO.Test/Readers/PointShapeFileReaderTest.cs	(.../PointShapeFileReaderTest.cs)	(revision 512788fc0ce981fa155451f30ef31c2ffe4bf2ce)
@@ -20,6 +20,7 @@
 // All rights reserved.
 
 using System.Collections.Generic;
+using System.IO;
 using System.Linq;
 
 using Core.Common.Base.Geometry;
@@ -74,6 +75,26 @@
         }
 
         [Test]
+        public void ParameteredConstructor_ShapeFileIsInUse_ThrowsCriticalFileReadException()
+        {
+            // Setup
+            string testFilePath = TestHelper.GetTestDataPath(TestDataPath.Core.Components.Gis.IO, "Single_Point_with_ID.shp");
+
+            using (File.Open(testFilePath, FileMode.Open, FileAccess.ReadWrite))
+            {
+                // Call
+                TestDelegate call = () => new PointShapeFileReader(testFilePath);
+
+                // Assert
+                var expectedMessage = string.Format("Fout bij het lezen van bestand '{0}': Er is een onverwachte fout opgetreden tijdens het inlezen van het bestand.",
+                                                    testFilePath);
+                CriticalFileReadException exception = Assert.Throws<CriticalFileReadException>(call);
+                Assert.AreEqual(expectedMessage, exception.Message);
+                Assert.IsInstanceOf<IOException>(exception.InnerException);
+            }
+        }
+
+        [Test]
         public void GetNumberOfLines_EmptyPointShapeFile_ReturnZero()
         {
             // Setup
Index: Core/Components/test/Core.Components.Gis.IO.Test/Readers/PolygonShapeFileReaderTest.cs
===================================================================
diff -u -r151bab16a7ebc1bffc0621ab56c6dc219db1e90f -r512788fc0ce981fa155451f30ef31c2ffe4bf2ce
--- Core/Components/test/Core.Components.Gis.IO.Test/Readers/PolygonShapeFileReaderTest.cs	(.../PolygonShapeFileReaderTest.cs)	(revision 151bab16a7ebc1bffc0621ab56c6dc219db1e90f)
+++ Core/Components/test/Core.Components.Gis.IO.Test/Readers/PolygonShapeFileReaderTest.cs	(.../PolygonShapeFileReaderTest.cs)	(revision 512788fc0ce981fa155451f30ef31c2ffe4bf2ce)
@@ -20,8 +20,8 @@
 // All rights reserved.
 
 using System.Collections.Generic;
+using System.IO;
 using System.Linq;
-
 using Core.Common.Base.Geometry;
 using Core.Common.IO.Exceptions;
 using Core.Common.TestUtil;
@@ -79,6 +79,26 @@
         }
 
         [Test]
+        public void ParameteredConstructor_ShapeFileIsInUse_ThrowsCriticalFileReadException()
+        {
+            // Setup
+            string testFilePath = TestHelper.GetTestDataPath(TestDataPath.Core.Components.Gis.IO, "Single_Multi-Polygon_with_ID.shp");
+
+            using (File.Open(testFilePath, FileMode.Open, FileAccess.ReadWrite))
+            {
+                // Call
+                TestDelegate call = () => new PolygonShapeFileReader(testFilePath);
+
+                // Assert
+                var expectedMessage = string.Format("Fout bij het lezen van bestand '{0}': Er is een onverwachte fout opgetreden tijdens het inlezen van het bestand.",
+                                                    testFilePath);
+                CriticalFileReadException exception = Assert.Throws<CriticalFileReadException>(call);
+                Assert.AreEqual(expectedMessage, exception.Message);
+                Assert.IsInstanceOf<IOException>(exception.InnerException);
+            }
+        }
+
+        [Test]
         public void GetNumberOfLines_EmptyPolygonShapeFile_ReturnZero()
         {
             // Setup
@@ -154,7 +174,7 @@
             using (var reader = new PolygonShapeFileReader(shapeWithOnePolygon))
             {
                 // Call
-                MapPolygonData polygon = (MapPolygonData)reader.ReadLine(name);
+                MapPolygonData polygon = (MapPolygonData) reader.ReadLine(name);
 
                 // Assert
                 Assert.AreEqual(name, polygon.Name);
@@ -173,7 +193,7 @@
             using (var reader = new PolygonShapeFileReader(shapeWithOnePolygon))
             {
                 // Call
-                MapPolygonData polygon = (MapPolygonData)reader.ReadLine(name);
+                MapPolygonData polygon = (MapPolygonData) reader.ReadLine(name);
 
                 // Assert
                 Assert.AreEqual("Polygoon", polygon.Name);
@@ -189,7 +209,7 @@
             using (var reader = new PolygonShapeFileReader(shapeWithOnePolygon))
             {
                 // Call
-                MapPolygonData polygon = (MapPolygonData)reader.ReadLine();
+                MapPolygonData polygon = (MapPolygonData) reader.ReadLine();
 
                 // Assert
                 Assert.IsNotNull(polygon);
@@ -218,7 +238,7 @@
             using (var reader = new PolygonShapeFileReader(shapeWithOnePolygonWithHoles))
             {
                 // Call
-                MapPolygonData polygon = (MapPolygonData)reader.ReadLine();
+                MapPolygonData polygon = (MapPolygonData) reader.ReadLine();
 
                 // Assert
                 Assert.IsNotNull(polygon);
@@ -281,7 +301,7 @@
             using (var reader = new PolygonShapeFileReader(shape))
             {
                 // Call
-                MapPolygonData polygon = (MapPolygonData)reader.ReadLine();
+                MapPolygonData polygon = (MapPolygonData) reader.ReadLine();
 
                 // Assert
                 Assert.IsNotNull(polygon);
@@ -313,14 +333,15 @@
                 Assert.AreEqual(4, reader.GetNumberOfLines());
 
                 // Call
-                MapPolygonData polygons1 = (MapPolygonData)reader.ReadLine();
-                MapPolygonData polygons2 = (MapPolygonData)reader.ReadLine();
-                MapPolygonData polygons3 = (MapPolygonData)reader.ReadLine();
-                MapPolygonData polygons4 = (MapPolygonData)reader.ReadLine();
+                MapPolygonData polygons1 = (MapPolygonData) reader.ReadLine();
+                MapPolygonData polygons2 = (MapPolygonData) reader.ReadLine();
+                MapPolygonData polygons3 = (MapPolygonData) reader.ReadLine();
+                MapPolygonData polygons4 = (MapPolygonData) reader.ReadLine();
 
                 // Assert
+
                 #region Assertsions for 'polygon1'
-                
+
                 MapFeature[] features1 = polygons1.Features.ToArray();
                 Assert.AreEqual(1, features1.Length);
 
@@ -406,7 +427,7 @@
             using (var reader = new PolygonShapeFileReader(shapeWithOnePolygon))
             {
                 // Call
-                MapPolygonData polygon = (MapPolygonData)reader.ReadShapeFile();
+                MapPolygonData polygon = (MapPolygonData) reader.ReadShapeFile();
 
                 // Assert
                 Assert.IsNotNull(polygon);
@@ -436,7 +457,7 @@
             using (var reader = new PolygonShapeFileReader(shape))
             {
                 // Call
-                MapPolygonData polygon = (MapPolygonData)reader.ReadShapeFile();
+                MapPolygonData polygon = (MapPolygonData) reader.ReadShapeFile();
 
                 // Assert
                 Assert.IsNotNull(polygon);
@@ -467,7 +488,7 @@
             using (var reader = new PolygonShapeFileReader(shapeWithOnePolygon))
             {
                 // Call
-                MapPolygonData polygon = (MapPolygonData)reader.ReadShapeFile(name);
+                MapPolygonData polygon = (MapPolygonData) reader.ReadShapeFile(name);
 
                 // Assert
                 Assert.AreEqual(name, polygon.Name);
@@ -486,7 +507,7 @@
             using (var reader = new PolygonShapeFileReader(shapeWithOnePolygon))
             {
                 // Call
-                MapPolygonData polygon = (MapPolygonData)reader.ReadShapeFile(name);
+                MapPolygonData polygon = (MapPolygonData) reader.ReadShapeFile(name);
 
                 // Assert
                 Assert.AreEqual("Polygoon", polygon.Name);
@@ -503,9 +524,9 @@
             {
                 // Precondition
                 Assert.AreEqual(4, reader.GetNumberOfLines());
-                
+
                 // Call
-                MapPolygonData polygons = (MapPolygonData)reader.ReadShapeFile();
+                MapPolygonData polygons = (MapPolygonData) reader.ReadShapeFile();
 
                 // Assert
                 MapFeature[] features = polygons.Features.ToArray();
@@ -585,7 +606,7 @@
         {
             // Setup
             string filePath = TestHelper.GetTestDataPath(TestDataPath.Core.Components.Gis.IO,
-                                                                       fileName);
+                                                         fileName);
             using (var reader = new PolygonShapeFileReader(filePath))
             {
                 for (int i = 0; i < reader.GetNumberOfLines(); i++)
@@ -606,7 +627,7 @@
         {
             // Setup
             string shapefileFilePath = TestHelper.GetTestDataPath(TestDataPath.Core.Components.Gis.IO,
-                                                                 "Single_Polygon_with_ID.shp");
+                                                                  "Single_Polygon_with_ID.shp");
             using (var reader = new PolygonShapeFileReader(shapefileFilePath))
             {
                 // Call
@@ -627,7 +648,7 @@
         {
             // Setup
             string shapefileFilePath = TestHelper.GetTestDataPath(TestDataPath.Core.Components.Gis.IO,
-                                                                 "Single_Polygon_with_ID.shp");
+                                                                  "Single_Polygon_with_ID.shp");
             using (var reader = new PolygonShapeFileReader(shapefileFilePath))
             {
                 // Call
@@ -638,4 +659,4 @@
             }
         }
     }
-}
+}
\ No newline at end of file
Index: Ringtoets/Integration/src/Ringtoets.Integration.Forms/Commands/AssessmentSectionFromFileCommandHandler.cs
===================================================================
diff -u -r239ea628125c5ec4004a843abce2d269af93c431 -r512788fc0ce981fa155451f30ef31c2ffe4bf2ce
--- Ringtoets/Integration/src/Ringtoets.Integration.Forms/Commands/AssessmentSectionFromFileCommandHandler.cs	(.../AssessmentSectionFromFileCommandHandler.cs)	(revision 239ea628125c5ec4004a843abce2d269af93c431)
+++ Ringtoets/Integration/src/Ringtoets.Integration.Forms/Commands/AssessmentSectionFromFileCommandHandler.cs	(.../AssessmentSectionFromFileCommandHandler.cs)	(revision 512788fc0ce981fa155451f30ef31c2ffe4bf2ce)
@@ -117,7 +117,7 @@
                 }
                 catch (ArgumentOutOfRangeException exception)
                 {
-                    log.Warn(string.Format(Resources.AssessmentSectionFromFileCommandHandler_CreateAssessmentSection_Unable_to_set_value_0, selectedLimitValue.Value), exception);
+                    log.Warn(string.Format(Resources.AssessmentSectionFromFileCommandHandler_CreateAssessmentSection_Unable_to_set_Value_0, selectedLimitValue.Value), exception);
                 }
             }
             return assessmentSection;
Index: Ringtoets/Integration/src/Ringtoets.Integration.Forms/Properties/Resources.Designer.cs
===================================================================
diff -u -r239ea628125c5ec4004a843abce2d269af93c431 -r512788fc0ce981fa155451f30ef31c2ffe4bf2ce
--- Ringtoets/Integration/src/Ringtoets.Integration.Forms/Properties/Resources.Designer.cs	(.../Resources.Designer.cs)	(revision 239ea628125c5ec4004a843abce2d269af93c431)
+++ Ringtoets/Integration/src/Ringtoets.Integration.Forms/Properties/Resources.Designer.cs	(.../Resources.Designer.cs)	(revision 512788fc0ce981fa155451f30ef31c2ffe4bf2ce)
@@ -138,9 +138,9 @@
         /// <summary>
         ///   Looks up a localized string similar to De waarde &apos;{0}&apos; kan niet gezet..
         /// </summary>
-        public static string AssessmentSectionFromFileCommandHandler_CreateAssessmentSection_Unable_to_set_value_0 {
+        public static string AssessmentSectionFromFileCommandHandler_CreateAssessmentSection_Unable_to_set_Value_0 {
             get {
-                return ResourceManager.GetString("AssessmentSectionFromFileCommandHandler_CreateAssessmentSection_Unable_to_set_val" +
+                return ResourceManager.GetString("AssessmentSectionFromFileCommandHandler_CreateAssessmentSection_Unable_to_set_Val" +
                         "ue_0", resourceCulture);
             }
         }
Index: Ringtoets/Integration/src/Ringtoets.Integration.Forms/Properties/Resources.resx
===================================================================
diff -u -r239ea628125c5ec4004a843abce2d269af93c431 -r512788fc0ce981fa155451f30ef31c2ffe4bf2ce
--- Ringtoets/Integration/src/Ringtoets.Integration.Forms/Properties/Resources.resx	(.../Resources.resx)	(revision 239ea628125c5ec4004a843abce2d269af93c431)
+++ Ringtoets/Integration/src/Ringtoets.Integration.Forms/Properties/Resources.resx	(.../Resources.resx)	(revision 512788fc0ce981fa155451f30ef31c2ffe4bf2ce)
@@ -278,7 +278,7 @@
   <data name="AssessmentSectionFromFileCommandHandler_CreateAssessmentSection_Importing_ReferenceLineFailed" xml:space="preserve">
     <value>Het importeren van de referentielijn is mislukt.</value>
   </data>
-  <data name="AssessmentSectionFromFileCommandHandler_CreateAssessmentSection_Unable_to_set_value_0" xml:space="preserve">
+  <data name="AssessmentSectionFromFileCommandHandler_CreateAssessmentSection_Unable_to_set_Value_0" xml:space="preserve">
     <value>De waarde '{0}' kan niet gezet.</value>
   </data>
 </root>
\ No newline at end of file