OmniSharp is not able to resolve correctly Uri class from System in Csharp script file csx.

[hanpari]

Issue Description

OmniSharp is not able to resolve correctly Uri class from System in Csharp script file csx.
This happens in WSL: Ubuntu. The script is running correctly when triggered by dotnet-script
When under Windows VS Code, everything including OmniSharp works just fine. No issue encountered.

Steps to Reproduce

Expected Behavior

Actual Behavior

Logs

OmniSharp log

Post the output from Output-->OmniSharp log here

C# log

Post the output from Output-->C# here

Environment information

VSCode version: 1.50.1
C# Extension: 1.23.4

Mono Information

OmniSharp using built-in mono

Dotnet Information

.NET Core SDK (reflecting any global.json): Version: 3.1.403 Commit: 9e895200cd

Runtime Environment:
OS Name: ubuntu
OS Version: 20.04
OS Platform: Linux
RID: ubuntu.20.04-x64
Base Path: /usr/share/dotnet/sdk/3.1.403/

Host (useful for support):
Version: 3.1.9
Commit: 774fc3d6a9

.NET Core SDKs installed:
3.1.403 [/usr/share/dotnet/sdk]

.NET Core runtimes installed:
Microsoft.AspNetCore.App 3.1.9 [/usr/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.NETCore.App 3.1.9 [/usr/share/dotnet/shared/Microsoft.NETCore.App]

To install additional .NET Core runtimes or SDKs:
https://aka.ms/dotnet-download

Visual Studio Code Extensions

Extension	Author	Version
csharp	ms-dotnettools	1.23.4
gitlens	eamodio	10.2.2
LiveServer	ritwickdey	5.6.1
ng-template	Angular	0.1001.0
python	ms-python	2020.9.114305
restructuredtext	lextudio	129.0.0
vscode-conventional-commits	vivaxy	1.12.1

[filipw]

can you please set omnisharp.loggingLevel to debug and post the omnisharp log?

[hanpari]

Sure,

I attached the file with the log.

201028_omnisharp_log.txt

The most relevant piece of information seems to be this:

{
  "Request_seq": 19,
  "Command": "/codecheck",
  "Running": true,
  "Success": true,
  "Message": null,
  "Body": {
    "QuickFixes": [
      {
        "LogLevel": "Error",
        "Id": "CS1069",
        "Tags": [],
        "FileName": "/home/pavel/projects/simple-hash/uritest.csx",
        "Line": 1,
        "Column": 1,
        "EndLine": 1,
        "EndColumn": 4,
        "Text": "The type name 'Uri' could not be found in the namespace 'System'. This type has been forwarded to assembly 'System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' Consider adding a reference to that assembly.",
        "Projects": [
          "uritest.csx"
        ]
      },
      {
        "LogLevel": "Error",
        "Id": "CS1069",
        "Tags": [],
        "FileName": "/home/pavel/projects/simple-hash/uritest.csx",
        "Line": 1,
        "Column": 13,
        "EndLine": 1,
        "EndColumn": 16,
        "Text": "The type name 'Uri' could not be found in the namespace 'System'. This type has been forwarded to assembly 'System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' Consider adding a reference to that assembly.",
        "Projects": [
          "uritest.csx"
        ]
      }
    ]
  },
  "Seq": 378,
  "Type": "response"
}

[filipw]

The log shows Unable to find dependency context for CSX files. Will default to non-context usage (Desktop CLR scripts).

it means you have not activated the dotnet-script compatible mode in OmniSharp and it defaults to CSI mode. you need to add omnisharp.json file at the root of your workspace. you can also add it globally using these instructions https://github.com/OmniSharp/omnisharp-roslyn/wiki/Configuration-Options#global-omnisharpjson

{
  "script": {
    "enableScriptNuGetReferences": true,
    "defaultTargetFramework": "netcoreapp3.1"
  }
}

dotnet script init also generates the relevant omnisharp.json

can you try this and see if it helps?

[hanpari]

Yes, it is working now. Thank you.