Visual Studio 2017 bin\roslyn files locked during build

Question

I am running VS2017 version 26430.13 and every time I try to build a web project I get errors that access to the files in the bin\\roslyn is denied. Over a period of about 5 mi

Answer 1

Revert the Microsoft.CodeDom.Providers.DotNetCompilerPlatform package to V1.0.4

This advice came from a comment on the developer community problem report https://developercommunity.visualstudio.com/solutions/79954/view.html.

We were on v1.0.5 and experienced locked files frequently. After reverting the Microsoft.CodeDom.Providers.DotNetCompilerPlatform package to V1.0.4 we are no longer experiencing locked files.