安裝完visual studio 2017 后添加引用總是提示 未能加載包ReferenceManagerPackage， 這個問題困擾了兩天，直到在網上看到了下面這一段
I just got this error after installation of Visual Studio 2017.
The solution was as follows.
- Launch
Developer Command Prompt for VS 2017 CD C:\Program Files\Microsoft Visual Studio\2017\Community\Common7\IDE\PublicAssemblies- Run
gacutil -i Microsoft.VisualStudio.Shell.Interop.11.0.dll
You should now see
Microsoft (R) .NET Global Assembly Cache Utility. Version 4.0.30319.0
Copyright (c) Microsoft Corporation. All rights reserved.
Assembly successfully added to the cache
Restart Visual Studio and hopefully all will be well and you can add references.
The file C:\Users\USER\AppData\Roaming\Microsoft\VisualStudio\15.0_cc9cc69a\ActivityLog.xml is useful for debugging any other assemblies that may be causing the issue. Annoyingly it's very tempting to click No when asked never to see the error message again, which will suppress the error and this path so I thought I'd post it here for reference.