Index: Ringtoets/Integration/src/Ringtoets.Integration.Forms/BackgroundMapDataSelectionDialog.cs
===================================================================
diff -u -r0e50500bb017c821970b286992f14b03dca0e69d -r7dcf169799c42e16f0badadb62624806c4f7fb00
--- Ringtoets/Integration/src/Ringtoets.Integration.Forms/BackgroundMapDataSelectionDialog.cs	(.../BackgroundMapDataSelectionDialog.cs)	(revision 0e50500bb017c821970b286992f14b03dca0e69d)
+++ Ringtoets/Integration/src/Ringtoets.Integration.Forms/BackgroundMapDataSelectionDialog.cs	(.../BackgroundMapDataSelectionDialog.cs)	(revision 7dcf169799c42e16f0badadb62624806c4f7fb00)
@@ -56,8 +56,6 @@
                 new WmtsLocationControl(mapData as WmtsMapData, new BruTileWmtsCapabilityFactory())
             };
 
-            SelectedMapData = mapData;
-
             InitializeComponent();
             InitializeButtons();
             InitializeComboBox();
@@ -84,11 +82,11 @@
         {
             if (mapData is WellKnownTileSourceMapData)
             {
-                return mapDatas.OfType<WellKnownMapDataControl>().First();
+                return mapDatas.OfType<WellKnownMapDataControl>().Single();
             }
             if (mapData is WmtsMapData)
             {
-                return mapDatas.OfType<WmtsLocationControl>().First();
+                return mapDatas.OfType<WmtsLocationControl>().Single();
             }
             return mapDatas.First();
         }