TFS204018 error when installing NuGet Package in VS2015

Question

Whenever I install a NuGet package in a TFS source-controlled VS 2015 project, I get a message similar to the following output under "Source Control - Team Foundation":

TF204018: Could not check the file's encoding because the file C:\\TFS\\Oz.Interfaces\\Main\\Source\\MVRSTamperCodes\\MVRSTamperCodes.Web\\web.config is in use.

I've been searching fruitlessly to see if there's a way to fix this issue and haven't found anything yet. Does anyone know what is causing this message and/or what steps I can take to fix it? I should note that this doesn't prevent the successful installation of the NuGet package so it appears to just be a warning or informational message.

Answer 1

I've met similar issue with blocking web.config and other files. My solution was:

1. Uninstall NuGet Package Manager ( Tools -> Extensions and Updates )
2. Install newest version (currently: Nuget 3.2 )

Answer 2

如果您正在使用Team Foundation Server，则在更新项目的Nuget包之前，如果遇到此问题，则需要先检查整个项目。