add references to the required projects.

DeathSocketCLI/DeathSocketCLI.fsproj

@@ -62,6 +62,13 @@
       <Private>True</Private>
     </Reference>
   </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\DeathSocket\DeathSocket.fsproj">
+      <Name>DeathSocket</Name>
+      <Project>{6eb4b4dd-10fa-44af-94c8-dd49f0a0b7d8}</Project>
+      <Private>True</Private>
+    </ProjectReference>
+  </ItemGroup>
   <!-- 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.
   <Target Name="BeforeBuild">

TestCentre/TestCentre.fsproj

@@ -58,6 +58,18 @@
       <Private>True</Private>
     </Reference>
   </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\DeathSocketCLI\DeathSocketCLI.fsproj">
+      <Name>DeathSocketCLI</Name>
+      <Project>{76500d4f-81e0-4c47-8190-f897b986e2ef}</Project>
+      <Private>True</Private>
+    </ProjectReference>
+    <ProjectReference Include="..\DeathSocket\DeathSocket.fsproj">
+      <Name>DeathSocket</Name>
+      <Project>{6eb4b4dd-10fa-44af-94c8-dd49f0a0b7d8}</Project>
+      <Private>True</Private>
+    </ProjectReference>
+  </ItemGroup>
   <!-- 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.
   <Target Name="BeforeBuild">