Index: Core/Plugins/src/Core.Plugins.Map/PresentationObjects/MapDataContext.cs
===================================================================
diff -u -red92d5353ea8138720874c61c353fd70fd12d3d0 -r7b3ee0978809b7e423487a599c3ded787efeeefe
--- Core/Plugins/src/Core.Plugins.Map/PresentationObjects/MapDataContext.cs	(.../MapDataContext.cs)	(revision ed92d5353ea8138720874c61c353fd70fd12d3d0)
+++ Core/Plugins/src/Core.Plugins.Map/PresentationObjects/MapDataContext.cs	(.../MapDataContext.cs)	(revision 7b3ee0978809b7e423487a599c3ded787efeeefe)
@@ -28,7 +28,7 @@
     /// <summary>
     /// Presentation object for <see cref="MapData"/>.
     /// </summary>
-    public class MapDataContext : ObservableWrappedObjectContextBase<MapData>
+    public abstract class MapDataContext : ObservableWrappedObjectContextBase<MapData>
     {
         /// <summary>
         /// Creates a new instance of <see cref="MapDataContext"/>.
@@ -37,7 +37,7 @@
         /// <param name="parentMapData">The parent <see cref="MapDataCollection"/> 
         /// the <paramref name="wrappedData"/> belongs to.</param>
         /// <exception cref="ArgumentNullException">Thrown when any parameter is <c>null</c>.</exception>
-        public MapDataContext(MapData wrappedData, MapDataCollection parentMapData)
+        protected MapDataContext(MapData wrappedData, MapDataCollection parentMapData)
             : base(wrappedData)
         {
             if (parentMapData == null)
Index: Core/Plugins/test/Core.Plugins.Map.Test/Legend/MapLegendViewTest.cs
===================================================================
diff -u -r3098804e6dc9d7aae2733700bfb5772eab1956d7 -r7b3ee0978809b7e423487a599c3ded787efeeefe
--- Core/Plugins/test/Core.Plugins.Map.Test/Legend/MapLegendViewTest.cs	(.../MapLegendViewTest.cs)	(revision 3098804e6dc9d7aae2733700bfb5772eab1956d7)
+++ Core/Plugins/test/Core.Plugins.Map.Test/Legend/MapLegendViewTest.cs	(.../MapLegendViewTest.cs)	(revision 7b3ee0978809b7e423487a599c3ded787efeeefe)
@@ -29,6 +29,7 @@
 using Core.Common.Util.Reflection;
 using Core.Components.Gis.Data;
 using Core.Components.Gis.Forms;
+using Core.Components.Gis.TestUtil;
 using Core.Plugins.Map.Legend;
 using Core.Plugins.Map.PresentationObjects;
 using Core.Plugins.Map.Properties;
@@ -191,7 +192,7 @@
                 Data = mapDataCollection
             })
             {
-                var context = new MapDataContext(mapData, mapDataCollection);
+                var context = new TestMapDataContext(mapData, mapDataCollection);
 
                 var treeViewControl = TypeUtils.GetField<TreeViewControl>(view, "treeViewControl");
                 WindowsFormsTestHelper.Show(treeViewControl);
@@ -258,7 +259,7 @@
                 view.SelectionChanged += (sender, args) => selectionChangedCount++;
 
                 // When
-                var context = new MapDataContext(mapData, mapDataCollection);
+                var context = new TestMapDataContext(mapData, mapDataCollection);
                 treeViewControl.TrySelectNodeForData(context);
 
                 // Then
@@ -268,6 +269,12 @@
             WindowsFormsTestHelper.CloseAll();
         }
 
+        private class TestMapDataContext : MapDataContext
+        {
+            public TestMapDataContext(MapData wrappedData, MapDataCollection parentMapData)
+                : base(wrappedData, parentMapData) {}
+        }
+
         [Test]
         [Apartment(ApartmentState.STA)]
         public void GivenMapLegendView_WhenSettingData_SelectionChangedFired()
Index: Core/Plugins/test/Core.Plugins.Map.Test/PresentationObjects/MapDataContextTest.cs
===================================================================
diff -u -r659a905aa024b3d1cd02b7f832da26524e5f0bc1 -r7b3ee0978809b7e423487a599c3ded787efeeefe
--- Core/Plugins/test/Core.Plugins.Map.Test/PresentationObjects/MapDataContextTest.cs	(.../MapDataContextTest.cs)	(revision 659a905aa024b3d1cd02b7f832da26524e5f0bc1)
+++ Core/Plugins/test/Core.Plugins.Map.Test/PresentationObjects/MapDataContextTest.cs	(.../MapDataContextTest.cs)	(revision 7b3ee0978809b7e423487a599c3ded787efeeefe)
@@ -41,7 +41,7 @@
             collection.Add(data);
 
             // Call
-            var context = new MapDataContext(data, collection);
+            var context = new TestMapDataContext(data, collection);
 
             // Assert
             Assert.IsInstanceOf<ObservableWrappedObjectContextBase<MapData>>(context);
@@ -53,11 +53,17 @@
         public void Constructor_ParentMapDataNull_ThrowsArgumentNullException()
         {
             // Call
-            TestDelegate call = () => new MapDataContext(new TestMapData(), null);
+            TestDelegate call = () => new TestMapDataContext(new TestMapData(), null);
 
             // Assert
             var exception = Assert.Throws<ArgumentNullException>(call);
             Assert.AreEqual("parentMapData", exception.ParamName);
         }
+
+        private class TestMapDataContext : MapDataContext
+        {
+            public TestMapDataContext(MapData wrappedData, MapDataCollection parentMapData) 
+                : base(wrappedData, parentMapData) {}
+        }
     }
 }
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