IQueryableObjectSource not found exception

[otryshko]

[ErikEJ]

Do you have VS 17.9?

[Giorgi]

The IQueryableObjectSource.dll is included in the VSIX and should be available in the following folder:

C:\Users\voffka\AppData\Local\Microsoft\VisualStudio\17.0_e12c492d\Extensions\5kiuggqj.gub\netcoreapp

Can you check if it's there?

[otryshko]

Yes, 17.9.1.

Yes, the file is in the folder which is on screenshot so I'm not sure what is going on. When I look at the dll with dotPeek, it seems that one reference does not work, but it could be a false positive

[Giorgi]

Can you run Procmon and see if the DLL is accessed or not?

[Giorgi]

This is what I get when I run the visualizer:

[otryshko]

No, procmon doesn't capture any attempts to load IQueryableObjectSource

FWIW, getting "System.MissingMethodException thrown when loading the VisualizerAssemblyLoadContext. Message: Cannot dynamically create an instance of type 'Microsoft.VisualStudio.NetCoreAssemblyResolution.VisualizerAssemblyLoadContext'. Reason: No parameterless constructor defined." in the debugger output

Also this VS Community Edition running as an admin

[Giorgi]

@otryshko I have no idea why VS doesn't load the IQueryableObjectSource.dll but the error message you see is the same as the one in #28.

Can you post your steps to reproduce at https://developercommunity.visualstudio.com/t/SystemMissingMethodException-thrown-whe/10612094 ?

[ErikEJ]

Can you share a repro project?

[otryshko]

Figured it out; @Giorgi you were correct that it's related to the access denied to the extension folder (dll/Resources). The project is the asp.net core app running under the IIS AppPool identity. Once I granted the identity account access to the folder, it started to work.

Not sure if it's possible to check for it in advance/show better error message.

[Giorgi]

Nice to hear that it's working now! I'm also not sure if it's possible to detect that but as the issue is now solved for you I'll close this issue.