Visual Studio中Reference Paths无法覆盖NuGet包DLL引用的问题咨询

I’ve run into this exact frustration before—Reference Paths seem like they should let you swap in local DLLs without ditching NuGet, but they don’t work as straightforwardly as you might think. Here’s what you’re probably missing:

• NuGet References Have Higher Priority
  Reference Paths are a fallback search mechanism. If your project already has a <Reference> entry for the NuGet package with a <HintPath> pointing to the packages folder, Visual Studio will use that path first every time. It won’t even check your Reference Paths unless the NuGet DLL is missing or the reference is marked as "not found."

• Check Your Project File’s Hidden Config
  Open your .csproj file in a text editor and look for the reference in question. You’ll likely see something like:

  <Reference Include="YourPackage, Version=X.X.X.X, Culture=neutral, PublicKeyToken=abc123, processorArchitecture=MSIL">
    <HintPath>..\packages\YourPackage.X.X.X\lib\net472\YourPackage.dll</HintPath>
    <Private>True</Private>
  </Reference>
  

  To let Reference Paths take over:

  • Remove the <HintPath> line entirely
  • Set <SpecificVersion> to False (add it if it’s missing)
    This tells VS to look for the first matching DLL in your Reference Paths instead of the hardcoded NuGet location.

• Binding Redirects Might Be Forcing NuGet’s Version
  If your app.config or web.config has an <assemblyBinding> redirect for the package, it’ll override your local DLL even if Reference Paths find it. Look for something like:

  <dependentAssembly>
    <assemblyIdentity name="YourPackage" publicKeyToken="abc123" culture="neutral" />
    <bindingRedirect oldVersion="0.0.0.0-X.X.X.X" newVersion="X.X.X.X" />
  </dependentAssembly>
  

  Either update the newVersion to match your local DLL’s version, or remove the redirect entirely if you don’t need it.

• Clean Up VS’s Cache
  Visual Studio loves to cache old reference paths. After adjusting Reference Paths or your project file:

  • Run Clean Solution from the Build menu
  • Delete the bin and obj folders manually
  • Rebuild the solution from scratch
    This ensures VS isn’t holding onto old NuGet DLL copies.

• Double-Check Your Reference Paths Setup
  Make sure you’re adding the path to the folder containing your local DLL (not the DLL itself) in the correct project’s Reference Paths (each project has its own settings, not a solution-wide one). Use a relative path (e.g., ..\LocalDLLs) instead of an absolute path to keep things portable.

A Quick Workflow to Make This Work #

1. Keep the NuGet reference in your project (so you don’t lose any related config or dependencies)
2. Edit the .csproj file to remove <HintPath> and set <SpecificVersion>False for the reference
3. Add your local DLL folder to the project’s Reference Paths
4. Clean, delete bin/obj, and rebuild

This way, you get the best of both worlds—you can keep NuGet for dependency management, but use your local DLL for testing/debugging without manually swapping references every time.

内容的提问来源于stack exchange，提问作者E West