C# – How to fix the Microsoft Visual Studio error: “package did not load correctly”

cvisual studiovisual studio 2012visual-studio-2017

I installed Visual Studio 2012 and DevExpress 13.1. As Visual Studio started, it generated an error shown by this attached image,

The 'Microsoft.VisualStudio.Editor.Implementation.EditorPackage' package did not load correctly.

The problem may have been caused by a configuration change or by the installation of another extension. You can get more information by examining the file 'C:\Users\must\AppData\Roaming\Microsoft\VisualStudio\11.0\ActivityLog.xml'.

Continue to show this error message?

Microsoft Visual Studio - The 'Microsoft.VisualStudio.Editor.Implementation.EditorPackage' package did not load correctly.

This error also appears in Visual Studio 2017.

Best Answer

I started to see this on a fresh Windows and Visual Studio 2013 Ultimate with Update 2 installation (although others have also reported it on Updates 3 and 4, as well as the Professional version).

To resolve the problem, close all Visual Studio instances, then delete all files in the following folder:

Visual Studio 2013

%localappdata%\Microsoft\VisualStudio\12.0\ComponentModelCache

It worked fine for me. Thanks to this article.

Visual Studio 2015

%localappdata%\Microsoft\VisualStudio\14.0\ComponentModelCache

Visual Studio 2017

%localappdata%\Microsoft\VisualStudio\15.0_xxxx\ComponentModelCache

Visual Studio 2019

%localappdata%\Microsoft\VisualStudio\16_xxxx\ComponentModelCache
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