How to Fix the 'Could not find a part of the path '...\bin\roslyn\csc.exe'' Error in ASP.NET MVC?

Resolving "Could not find a part of the path '...binroslyncsc.exe'" Error in ASP.NET MVC Projects

Encountering the "Could not find a part of the path '...binroslyncsc.exe'" error while attempting to run an ASP.NET MVC project can be puzzling, especially if Roslyn was not explicitly integrated into the project.

Background of Roslyn

Roslyn, a .NET compiler platform, provides advanced compilation capabilities. However, it is not typically installed or configured within ASP.NET MVC projects by default.

Cause of the Error

The error occurs due to a bug in certain versions of the Microsoft.CodeDom.Providers.DotNetCompilerPlatform NuGet package. This package installs the Roslyn compiler and its dependencies.

Solution

To resolve the issue, execute the following command in the Package Manager Console:

Update-Package Microsoft.CodeDom.Providers.DotNetCompilerPlatform -r

This command updates the package to a bug-free version.

Additional Considerations

If the error persists after updating the package, ensure that the following conditions are met:

• Correct NuGet Package Paths: Verify that the paths referenced in the and tags within the .csproj file point correctly to the NuGet packages.
• Project Compatibility: Ensure that the project targets the correct framework version and that referenced assemblies are compatible with the targeted framework.

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