Can not delete \bin\roslyn\VBCSCompiler.exe - Access is denied
Solution 1
Same problem here - solution for me was closing VS, open task manager and end all instances of VBCSCompiler.exe as mentionend here: https://developercommunity.visualstudio.com/content/problem/71302/binroslyn-files-locked-during-build.html
Solution 2
In the 'Manage NuGET Packages' window I downgraded Microsoft.Net.Compilers to 2.3.0 (from 2.3.1) and also downgraded Microsoft.CodeDom.Providers.DotNetCompilerPlatform to 1.0.4 (from 1.0.5) and the Roslyn directory/files were no longer marked as readonly and no longer locked by the exe.
Solution 3
Goto Taskmanager --> under process tab ---> find VBCSCompiler.exe and end this task. then try to delete the folder
Rey
I work as a .NET Developer, mainly in c# and other technologies related to .NET framework like ASP.NET MVC, ASP.NET Webforms etc... I like to explore new technologies and different programming libraries. In my free time I can be found looking at stackoverflow.com or watching a movie, sometimes I like reading as well.
Updated on March 31, 2020Comments
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Rey about 4 years
I am facing a strange issue from roslyn compiler. Sometimes when I build the solution I face a strange issue in error list which does not let me build the solution. Here is the error:
Severity Code Description Project File Line Suppression State Error Unable to copy file "D:\Sealogical New Website\SealogicalWebsite\packages\Microsoft.Net.Compilers.1.0.0\tools\csc.exe" to "bin\roslyn\csc.exe". Access to the path 'bin\roslyn\csc.exe' is denied. SealogicalWebsite
Severity Code Description Project File Line Suppression State Error Unable to copy file "D:\Sealogical New Website\SealogicalWebsite\packages\Microsoft.Net.Compilers.1.0.0\tools\VBCSCompiler.exe" to "bin\roslyn\VBCSCompiler.exe". Access to the path 'bin\roslyn\VBCSCompiler.exe' is denied. SealogicalWebsite
I try to clean the solution and rebuild it but does not work again.
Tried to delete files manually but again shows an error pointing out I do not have right permissions to do this:
Tried deleting from
CMD
but again shows the same error:
The only way to delete roslyn generated files is by restarting the PC and when restarted I can delete them manually without a problem.
I am administrator in my PC so there is no problem with that I guess.
This problem seems to happen in Visual Studi0 2015 and Visual Studio 2017.
I dont like restarting the PC 4-5 times a day or more thats why I am asking here.
Some other details:
I am the one who created this project so theoretically it should not be a problem to do this action.
When the project first created I did run the Visual Studion in Administrator Mode as I am doing now.
- I am using ASP.MVC 5 template in my project.
- Files which do not get deleted are
bin/roslyn/csc
andbin/roslyn/VBCSCompiler
.
I could find a solution to remove this part from web.config so it does not generate those files:
<compilers> <compiler language="c#;cs;csharp" extension=".cs" type="Microsoft.CodeDom.Providers.DotNetCompilerPlatform.CSharpCodeProvider, Microsoft.CodeDom.Providers.DotNetCompilerPlatform, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" warningLevel="4" compilerOptions="/langversion:6 /nowarn:1659;1699;1701" /> <compiler language="vb;vbs;visualbasic;vbscript" extension=".vb" type="Microsoft.CodeDom.Providers.DotNetCompilerPlatform.VBCodeProvider, Microsoft.CodeDom.Providers.DotNetCompilerPlatform, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" warningLevel="4" compilerOptions="/langversion:14 /nowarn:41008 /define:_MYTYPE=\"Web\" /optionInfer+" /> </compilers>
But this solution would cause problem with new c# 6 features so I can not remove this section.....
Furthermore I tried this command in CMD to see if there is a process locking this file but anyway it did not show me any process at all:
C:\WINDOWS\system32>tasklist /m D:\SealogicalNewWebsite\SealogicalWebsite\SealogicalWebsite\bin\roslyn\csc.exe INFO: No tasks are running which match the specified criteria.
Does anybody knows a way how to handle this strange issue ?
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Rey over 6 yearsSometimes it works and sometimes it doesnt but I will accept this as the best answer since I could not find any better answer than this one. Thanks :)
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HumbleBeginnings over 6 yearsPer the link above on 09.27.2017 there is a fix slated for release in VS2017 V15.2.
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Jalal about 6 yearsJust run
update-package
forMicrosoft.CodeDom.Providers.DotNetCompilerPlatform
andMicrosoft.Net.Compilers
in nuget console. -
abdul qayyum over 4 yearsVS 2019 latest version and still this answer solved my problem