diff --git a/CSharp/Libraries/UniversalEditor.Core/UniversalEditor.Core.csproj b/CSharp/Libraries/UniversalEditor.Core/UniversalEditor.Core.csproj
index 341d6d79..ff3a2a32 100644
--- a/CSharp/Libraries/UniversalEditor.Core/UniversalEditor.Core.csproj
+++ b/CSharp/Libraries/UniversalEditor.Core/UniversalEditor.Core.csproj
@@ -60,7 +60,6 @@
     <Compile Include="CustomDataFormatItem.cs" />
     <Compile Include="CustomDataFormatStructure.cs" />
     <Compile Include="CustomDataFormatStructureInstance.cs" />
-    <Compile Include="ObjectModelCustomProperty.cs" />
     <Compile Include="DataCorruptedException.cs" />
     <Compile Include="DataFormatCapabilities.cs" />
     <Compile Include="DataFormatException.cs" />