I just finished upgrading NuGet packages in a large solution I am working on. The project itself built fine and ran. However, when I went to run the project a second time it gave several errors on build: (the ... is the path to the project)
C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\15.0\Bin\Microsoft.Common.CurrentVersion.targets(4825,5): warning MSB3061: Unable to delete file "...\bin\roslyn\Microsoft.DiaSymReader.Native.amd64.dll". Access to the path '...\bin\roslyn\Microsoft.DiaSymReader.Native.amd64.dll' is denied. C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\15.0\Bin\Microsoft.Common.CurrentVersion.targets(4825,5): warning MSB3061: Unable to delete file "...\bin\roslyn\System.Diagnostics.FileVersionInfo.dll". Access to the path '...\bin\roslyn\System.Diagnostics.FileVersionInfo.dll' is denied. C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\15.0\Bin\Microsoft.Common.CurrentVersion.targets(4825,5): warning MSB3061: Unable to delete file "...\bin\roslyn\System.IO.Compression.dll". Access to the path '...\bin\roslyn\System.IO.Compression.dll' is denied. C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\15.0\Bin\Microsoft.Common.CurrentVersion.targets(4825,5): warning MSB3061: Unable to delete file "...\bin\roslyn\System.IO.FileSystem.Primitives.dll". Access to the path '...\bin\roslyn\System.IO.FileSystem.Primitives.dll' is denied. C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\15.0\Bin\Microsoft.Common.CurrentVersion.targets(4825,5): warning MSB3061: Unable to delete file "...\bin\roslyn\System.Security.Cryptography.Primitives.dll". Access to the path '...\bin\roslyn\System.Security.Cryptography.Primitives.dll' is denied. C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\15.0\Bin\Microsoft.Common.CurrentVersion.targets(4825,5): warning MSB3061: Unable to delete file "...\bin\roslyn\System.Text.Encoding.CodePages.dll". Access to the path '...\bin\roslyn\System.Text.Encoding.CodePages.dll' is denied. C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\15.0\Bin\Microsoft.Common.CurrentVersion.targets(4825,5): warning MSB3061: Unable to delete file "...\bin\roslyn\System.Xml.ReaderWriter.dll". Access to the path '...\bin\roslyn\System.Xml.ReaderWriter.dll' is denied. C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\15.0\Bin\Microsoft.Common.CurrentVersion.targets(4825,5): warning MSB3061: Unable to delete file "...\bin\roslyn\System.Xml.XPath.XDocument.dll". Access to the path '...\bin\roslyn\System.Xml.XPath.XDocument.dll' is denied. C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\15.0\Bin\Microsoft.Common.CurrentVersion.targets(4825,5): warning MSB3061: Unable to delete file "...\bin\roslyn\VBCSCompiler.exe". Access to the path '...\bin\roslyn\VBCSCompiler.exe' is denied.
Here is my current setup:
Microsoft Visual Studio 2017 Professional (15.2 r26430.14)
Windows 10
Chrome and IE11
What I know is that it does not matter if I debug using Chrome vs. IE11. The issues is corrected when I open the task manager and kill the VBCSCompiler.exe. I get the errors on solution "clean". Anyone know what this executable does or what could be triggering it?