Go To Definition Using Language Server Protocol throws System.IO.FileNotFoundException HResult=0x80070002 Message=Could not load file or assembly 'Microsoft.CodeAnalysis, Version=4.1.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its

Question

Hi , i am developing VS extension using Language Server protocol for custom language .And i am referring https://github.com/tgjones/HlslTools/tree/master for developing. But when i click Go To definition i am getting error

System.IO.FileNotFoundException
  HResult=0x80070002
  Message=Could not load file or assembly 'Microsoft.CodeAnalysis, Version=4.1.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified.

Answer 1

Hi @Shilpalakshmi Mithur , 

Welcome to Microsoft Q&A! 

Are you using VS2019 or VS2022? Please update it to the latest version. 

From the error message, it may be caused by missing the NuGet package Microsoft.CodeAnalysis or its dependencies. 

Please ensure that the version of the referenced ‘Microsoft.CodeAnalysis’ package is 4.1.0.  

Or you can try to reinstall the NuGet package with version 4.1.0.

Sincerely,

Anna

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