Visual Studio 2013 DEBUG 预处理器指令始终定义

Question

I added a new project to a Visual Studio 2013 (12.0.40629.00 Update 5) solution, and suddenly the #if DEBUG checks pass for compiled code, even in release. The 'define DEBUG constant' is disabled for the release build, and all projects are built as release (as seen in the configuration manager).

I find several things on Google that this is a known bug that can be worked around by unloading and reloading the project (like here , but that doesn't help).

I also tried undef DEBUG , but also no luck.

Existing projects in the solution works, but this new one doesn't. It's a Dotnet standard 4.5, but setting it to 3.5 doesn't help.

As an indication of what happens in a release build:

Visual studio thinks it's inactive code, but it's obviously compiled in and executed (and debugged).

This makes it impossible to make release builds.

Edit: to elaborate on the question below: it's not a unit test, but I am starting to suspect that debug DLLs are taken. To be able to release, I quickly deleted all the code in #if DEBUG , and even after compiling that, the software tried to open the debug DB. When I recompiled debug, it was OK.

Answer 1

I ran into this again. I don't know how I did it, but apparently I added references as links to debug DLL's, instead of to projects in the solution.

This diff of a csproj explains it:

-    <Reference Include="Bla.Utils">
-      <HintPath>..\BlaUtillLib\obj\Debug\Bla.Utils.dll</HintPath>
-    </Reference>
     <Reference Include="System" />
     <Reference Include="System.Core" />
     <Reference Include="System.Data.Entity" />
@@ -166,12 +163,19 @@
       <Project>{e2bec86c-1c02-4182-8117-740612ed9330}</Project>
       <Name>DbDAL</Name>
     </ProjectReference>
+    <ProjectReference Include="..\BlaUtillLib\Bla.Utils.csproj">
+      <Project>{6de20344-62f7-45f7-92cd-dbeb19cdc4c5}</Project>
+      <Name>Bla.Utils</Name>
+    </ProjectReference>

I don't know how this happens. I don't go out of my way to browse to DLL's of the solution's own projects.