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 minutes the files are unlocked and I can build but the 5 minute delay is unacceptable. These are the files that stay locked: Microsoft.CodeAnalysis.CSharp.dll Microsoft.CodeAnalysis.dll Microsoft.CodeAnalysis.VisualBasic.dll Microsoft.DiaSymReader.Native.amd64.dll System.Collections.Immutable.dll System.Diagnostics.FileVersionInfo.dll System.IO.Compression.dll System.IO.FileSystem.dll System.IO.FileSystem.Primitives.dll System.Reflection.Metadata.dll System.Security.Cryptography.Algorithms.dl System.Security.Cryptography.Primitives.dl System.ValueTuple.dll VBCSCompiler.exe

UPDATE the Microsoft.CodeDom.Providers.DotNetCompilerPlatform package to V1.0.7 Find Microsoft.CodeDom.Providers.DotNetCompilerPlatform from NuGet Uninstall Old version Install V1.0.7 or latest

visual-studio-2017

John S

Reputation: 8351

Visual Studio 2017 bin\roslyn files locked during build

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 minutes the files are unlocked and I can build but the 5 minute delay is unacceptable.

These are the files that stay locked:

Microsoft.CodeAnalysis.CSharp.dll
Microsoft.CodeAnalysis.dll
Microsoft.CodeAnalysis.VisualBasic.dll
Microsoft.DiaSymReader.Native.amd64.dll
System.Collections.Immutable.dll
System.Diagnostics.FileVersionInfo.dll
System.IO.Compression.dll
System.IO.FileSystem.dll
System.IO.FileSystem.Primitives.dll
System.Reflection.Metadata.dll
System.Security.Cryptography.Algorithms.dl
System.Security.Cryptography.Primitives.dl
System.ValueTuple.dll
VBCSCompiler.exe

Upvotes: 67

Answers (16)

Younis Qadir

Reputation: 435

Deleting this dll Microsoft.CodeDom.Providers.DotNetCompilerPlatform solved the issue for me

Upvotes: 1

moto_geek

Reputation: 580

In VS2017 & VS2019, this can happen when IIS Express is still running. Open the tray next to the clock, hover over the IIS Express icon running, right-click on the icon, click "Exit", confirm prompt, close active running worker processes. This can also be true when trying to publish your web project as well.

Upvotes: 1

Muhammad Atif Nadeem

Reputation: 1

I was having the same issue in MVC 5. I just opened Nuget Package Manager, searched and updated the following:

Microsoft.CodeDom.Providers.DotNetCompilerPlatform

Upvotes: 0

Imran Ahmad Shahid

Reputation: 822

For me I just open solution in file explorer and delete bin folders of all projects in it. now it's working fine.

Upvotes: 1

JGilmartin

Reputation: 9298

for me updating the nuget package...

Microsoft.Net.Compilers

to the latest at the time of this post 2.7.0 fixed this for me. it was version 1.3.2

Upvotes: 1

Newred

Reputation: 729

Project > Manage NuGet Packages... > Installed(tab) > in search input set this:

codedom

click to update

Upvotes: 7

Ruan

Reputation: 4293

Before you try anything drastic, restart your computer

Upvotes: 0

hossein

Reputation: 1

In my case I did these two steps:

uninstall-package Microsoft.CodeDom.Providers.DotNetCompilerPlatform
Install-Package Microsoft.CodeDom.Providers.DotNetCompilerPlatform -Version 1.0.8

Upvotes: 0

TheDude

Reputation: 267

Install Microsoft.CodeDom.Providers.DotNetCompilerPlatform.BinFix nuget It fixed the issue for me

Upvotes: 1

sansalk

Reputation: 4761

UPDATE the Microsoft.CodeDom.Providers.DotNetCompilerPlatform package to V1.0.7

Find Microsoft.CodeDom.Providers.DotNetCompilerPlatform from NuGet Uninstall Old version
Install V1.0.7 or latest

Upvotes: 79

Usman

Reputation: 2577

I have VS 2017 Enterprise and for me the issue was resolved by this:

Downgraded Microsoft.Net.Compilers from 2.3.1 to 2.3.0
Downgraded Microsoft.CodeDom.Providers.DotNetCompilerPlatform from 1.0.5 to 1.0.4.

Upvotes: 3

Rob Hoffmann

Reputation: 1

Update the Microsoft.CodeDom.Providers.DotNetCompilerPlatform package to V1.0.6

Upvotes: -2

threadster

Reputation: 418

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.

Upvotes: 10

Mircea Matei

Reputation: 601

Instead of killing the process manually, you may use the following commands in a Pre-Build Event:

tasklist /FI "IMAGENAME eq VBCSCompiler.exe" 2>NUL | find /I /N "VBCSCompiler.exe">NUL
if "%ERRORLEVEL%"=="0" (taskkill /IM VBCSCompiler.exe /F) else (verify >NUL)

Upvotes: 14