New options now work fine.
diff --git a/src/ProtocolBuffers.Test/ProtocolBuffers.Test.csproj b/src/ProtocolBuffers.Test/ProtocolBuffers.Test.csproj
index 836ee2d..277348c 100644
--- a/src/ProtocolBuffers.Test/ProtocolBuffers.Test.csproj
+++ b/src/ProtocolBuffers.Test/ProtocolBuffers.Test.csproj
@@ -51,6 +51,7 @@
<Compile Include="CodedInputStreamTest.cs" />
<Compile Include="CodedOutputStreamTest.cs" />
<Compile Include="Collections\PopsicleListTest.cs" />
+ <Compile Include="CSharpOptionsTest.cs" />
<Compile Include="DescriptorsTest.cs" />
<Compile Include="DynamicMessageTest.cs" />
<Compile Include="GeneratedMessageTest.cs" />