Index: Ringtoets/Common/src/Ringtoets.Common.Plugin/Ringtoets.Common.Plugin.csproj
===================================================================
diff -u -r63fc151e9cf722527465c1eddfa6567a90feb5e6 -r37245bc18c974f3f961453ada3979f25976f17a0
--- Ringtoets/Common/src/Ringtoets.Common.Plugin/Ringtoets.Common.Plugin.csproj	(.../Ringtoets.Common.Plugin.csproj)	(revision 63fc151e9cf722527465c1eddfa6567a90feb5e6)
+++ Ringtoets/Common/src/Ringtoets.Common.Plugin/Ringtoets.Common.Plugin.csproj	(.../Ringtoets.Common.Plugin.csproj)	(revision 37245bc18c974f3f961453ada3979f25976f17a0)
@@ -9,6 +9,7 @@
   <ItemGroup>
     <Reference Include="System" />
     <Reference Include="System.Core" />
+    <Reference Include="System.Windows.Forms" />
   </ItemGroup>
   <ItemGroup>
     <Compile Include="Properties\AssemblyInfo.cs" />