Index: src/Plugins/Wti/Wti.Forms/Wti.Forms.csproj
===================================================================
diff -u -rab8c3b732c3aaadc8e55be98e132bdaf41110169 -rdd0526758fbd88f786a78a847b84a58faf464c1b
--- src/Plugins/Wti/Wti.Forms/Wti.Forms.csproj	(.../Wti.Forms.csproj)	(revision ab8c3b732c3aaadc8e55be98e132bdaf41110169)
+++ src/Plugins/Wti/Wti.Forms/Wti.Forms.csproj	(.../Wti.Forms.csproj)	(revision dd0526758fbd88f786a78a847b84a58faf464c1b)
@@ -70,6 +70,7 @@
     </Compile>
     <Compile Include="PropertyClasses\PipingDataProperties.cs" />
     <Compile Include="PropertyClasses\PipingOutputProperties.cs" />
+    <Compile Include="PropertyClasses\PipingSurfaceLineProperties.cs" />
     <Compile Include="PropertyClasses\WtiProjectProperties.cs" />
     <Service Include="{94E38DFF-614B-4cbd-B67C-F211BB35CE8B}" />
   </ItemGroup>