Index: Core/Components/src/Core.Components.OxyPlot.Forms/ChartControl.cs
===================================================================
diff -u -r4dbfc20ef0200e34db43efeb8899d72e4046cc5b -rd420d88d2514112972db8e6fb5d28e61c2dc8de3
--- Core/Components/src/Core.Components.OxyPlot.Forms/ChartControl.cs	(.../ChartControl.cs)	(revision 4dbfc20ef0200e34db43efeb8899d72e4046cc5b)
+++ Core/Components/src/Core.Components.OxyPlot.Forms/ChartControl.cs	(.../ChartControl.cs)	(revision d420d88d2514112972db8e6fb5d28e61c2dc8de3)
@@ -207,12 +207,9 @@
         private void DrawMissingChartDataOnCollectionChange(IEnumerable<ItemBasedChartData> chartDataThatShouldBeDrawn,
                                                             IDictionary<ItemBasedChartData, DrawnChartData> drawnChartDataLookup)
         {
-            foreach (var chartDataToDraw in chartDataThatShouldBeDrawn)
+            foreach (var chartDataToDraw in chartDataThatShouldBeDrawn.Where(chartDataToDraw => !drawnChartDataLookup.ContainsKey(chartDataToDraw))) 
             {
-                if (!drawnChartDataLookup.ContainsKey(chartDataToDraw))
-                {
-                    DrawChartData(chartDataToDraw);
-                }
+                DrawChartData(chartDataToDraw);
             }
         }
 
Index: Core/Components/src/Core.Components.OxyPlot/Core.Components.OxyPlot.csproj
===================================================================
diff -u -r4dbfc20ef0200e34db43efeb8899d72e4046cc5b -rd420d88d2514112972db8e6fb5d28e61c2dc8de3
--- Core/Components/src/Core.Components.OxyPlot/Core.Components.OxyPlot.csproj	(.../Core.Components.OxyPlot.csproj)	(revision 4dbfc20ef0200e34db43efeb8899d72e4046cc5b)
+++ Core/Components/src/Core.Components.OxyPlot/Core.Components.OxyPlot.csproj	(.../Core.Components.OxyPlot.csproj)	(revision d420d88d2514112972db8e6fb5d28e61c2dc8de3)
@@ -83,7 +83,6 @@
       <Private>False</Private>
     </ProjectReference>
   </ItemGroup>
-  <ItemGroup />
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.