The mystery of stuck inactive msbuild.exe processes, locked Stylecop.dll, Nuget AccessViolationException and CI builds clashing with each other

Question

Observations:

• On our Jenkins build server, we were seeing lots of msbuild.exe processes (~100) hanging around after job completion with around 20mb memory u

Answer 1

I had the same issue. One old reference I found was in csproj files

..\packages\StyleCop.MSBuild.4.7.48.0\tools\StyleCop.targets

Also, I deleted the entire "Packages" folder that's located in the same folder as sln file after I closed the visual studio. It triggered VS to rebuild the folder and let go of the cache of the old version of stylecop