Intellisense does not work with multiple directories in the workspace.

[AquariusStar]

There is a shared directory with three directories and one work.code-workspace file. Dotnet projects are created in each folder. Two of them are libraries. And one main one that connects to two library projects. And I noticed that Intellisense only works in one of them. And only the last one in the list works. If you don't use work.code-workspace, Intellisense works in all three directories. And this is inconvenient. Because work.code-workspace is used to perform some parameters.
"folders": [ { "path": "Service.TCP" // intellisense not working (main) }, { "path": "Service.IO.UART" // intellisense not working }, { "path": "Service.Device.Control" // intellisense working } ],

[stewartadam]

What does your omnisharp log show? (Output tab, select Omnisharp Log from the drop-down). I've seen similar behavior when one of the projects has trouble loading, and omnisharp appears to get 'stuck'.

[AquariusStar]

Judging by the log, he sees only one folder with the project for some reason. Below I post the omnisharp log:
Starting OmniSharp server at 03.12.2020, 10:51:07
Target: f:\Repository\Raspberry\TestProject\Service.Device.Control

OmniSharp server started.
Path: c:\Users\Michael.vscode\extensions\ms-dotnettools.csharp-1.23.6.omnisharp\1.37.3\OmniSharp.exe
PID: 7684

Starting OmniSharp on Windows 6.2.9200.0 (x64)
info: OmniSharp.Services.DotNetCliService
DotNetPath set to dotnet
info: OmniSharp.MSBuild.Discovery.MSBuildLocator
Located 1 MSBuild instance(s)
1: StandAlone 16.8.0 - "c:\Users\Michael.vscode\extensions\ms-dotnettools.csharp-1.23.6.omnisharp\1.37.3.msbuild\Current\Bin"
info: OmniSharp.MSBuild.Discovery.MSBuildLocator
MSBUILD_EXE_PATH environment variable set to 'c:\Users\Michael.vscode\extensions\ms-dotnettools.csharp-1.23.6.omnisharp\1.37.3.msbuild\Current\Bin\MSBuild.exe'
info: OmniSharp.MSBuild.Discovery.MSBuildLocator
Registered MSBuild instance: StandAlone 16.8.0 - "c:\Users\Michael.vscode\extensions\ms-dotnettools.csharp-1.23.6.omnisharp\1.37.3.msbuild\Current\Bin"
CscToolExe = csc.exe
CscToolPath = c:\Users\Michael.vscode\extensions\ms-dotnettools.csharp-1.23.6.omnisharp\1.37.3.msbuild\Current\Bin\Roslyn
MSBuildExtensionsPath = c:\Users\Michael.vscode\extensions\ms-dotnettools.csharp-1.23.6.omnisharp\1.37.3.msbuild
MSBuildToolsPath = c:\Users\Michael.vscode\extensions\ms-dotnettools.csharp-1.23.6.omnisharp\1.37.3.msbuild\Current\Bin
info: OmniSharp.Cake.CakeProjectSystem
Detecting Cake files in 'f:\Repository\Raspberry\TestProject\Service.Device.Control'.
info: OmniSharp.Cake.CakeProjectSystem
Could not find any Cake files
info: OmniSharp.MSBuild.ProjectSystem
No solution files found in 'f:\Repository\Raspberry\TestProject\Service.Device.Control'
info: OmniSharp.MSBuild.ProjectManager
Queue project update for 'f:\Repository\Raspberry\TestProject\Service.Device.Control\Service.Device.Control.csproj'
info: OmniSharp.Script.ScriptProjectSystem
Detecting CSX files in 'f:\Repository\Raspberry\TestProject\Service.Device.Control'.
info: OmniSharp.Script.ScriptProjectSystem
Could not find any CSX files
info: OmniSharp.WorkspaceInitializer
Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.CSharpFormattingWorkspaceOptionsProvider, Order: 0
info: OmniSharp.MSBuild.ProjectManager
Loading project: f:\Repository\Raspberry\TestProject\Service.Device.Control\Service.Device.Control.csproj
info: OmniSharp.WorkspaceInitializer
Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.Completion.CompletionOptionsProvider, Order: 0
info: OmniSharp.WorkspaceInitializer
Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.RenameWorkspaceOptionsProvider, Order: 100
info: OmniSharp.WorkspaceInitializer
Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.ImplementTypeWorkspaceOptionsProvider, Order: 110
info: OmniSharp.WorkspaceInitializer
Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.BlockStructureWorkspaceOptionsProvider, Order: 140
info: OmniSharp.WorkspaceInitializer
Configuration finished.
info: OmniSharp.Stdio.Host
Omnisharp server running using Stdio at location 'f:\Repository\Raspberry\TestProject\Service.Device.Control' on host 5820.
[warn]: OmniSharp.MSBuild.ProjectLoader
Could not write lines to file "obj\Debug\netstandard2.0.NETStandard,Version=v2.0.AssemblyAttributes.cs". Access to the path "f:\Repository\Raspberry\TestProject\Service.Device.Control\obj\Debug\netstandard2.0.NETStandard,Version=v2.0.AssemblyAttributes.cs" is denied.
[warn]: OmniSharp.MSBuild.ProjectLoader
The "WriteLinesToFile" task returned false but did not log an error.
info: OmniSharp.MSBuild.ProjectManager
Successfully loaded project file 'f:\Repository\Raspberry\TestProject\Service.Device.Control\Service.Device.Control.csproj'.
f:\Repository\Raspberry\TestProject\Service.Device.Control\Service.Device.Control.csproj
c:\Users\Michael.vscode\extensions\ms-dotnettools.csharp-1.23.6.omnisharp\1.37.3.msbuild\Current\Bin\Microsoft.Common.CurrentVersion.targets(3353,5): Error: Could not write lines to file "obj\Debug\netstandard2.0.NETStandard,Version=v2.0.AssemblyAttributes.cs". Access to the path "f:\Repository\Raspberry\TestProject\Service.Device.Control\obj\Debug\netstandard2.0.NETStandard,Version=v2.0.AssemblyAttributes.cs" is denied.
c:\Users\Michael.vscode\extensions\ms-dotnettools.csharp-1.23.6.omnisharp\1.37.3.msbuild\Current\Bin\Microsoft.Common.CurrentVersion.targets(3353,5): Error: The "WriteLinesToFile" task returned false but did not log an error.

Adding project 'f:\Repository\Raspberry\TestProject\Service.Device.Control\Service.Device.Control.csproj'
info: OmniSharp.MSBuild.ProjectManager
Update project: Service.Device.Control
[fail]: OmniSharp.Stdio.Host
************ Response ************
{
"Request_seq": 16,
"Command": "/v2/highlight",
"Running": true,
"Success": false,
"Message": ""System.ArgumentOutOfRangeException: Specified argument was out of the range of valid values.\r\nParameter name: line\r\n in Microsoft.CodeAnalysis.Text.LinePosition..ctor(Int32 line, Int32 character)\r\n in OmniSharp.Roslyn.CSharp.Services.SemanticHighlight.SemanticHighlightService.d__1.MoveNext() in D:\\a\\1\\s\\src\\OmniSharp.Roslyn.CSharp\\Services\\SemanticHighlight\\SemanticHighlightService.cs:line 36\r\n--- End of stack trace from previous location where exception was thrown ---\r\n in System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n in System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n in OmniSharp.Endpoint.EndpointHandler2.<GetFirstNotEmptyResponseFromHandlers>d__19.MoveNext()\\r\\n--- End of stack trace from previous location where exception was thrown ---\\r\\n in System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\\r\\n in System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\\r\\n in OmniSharp.Endpoint.EndpointHandler2.d__20.MoveNext() in D:\\a\\1\\s\\src\\OmniSharp.Host\\Endpoint\\EndpointHandler.cs:line 230\r\n--- End of stack trace from previous location where exception was thrown ---\r\n in System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n in System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n in OmniSharp.Endpoint.EndpointHandler2.<Process>d__16.MoveNext() in D:\\\\a\\\\1\\\\s\\\\src\\\\OmniSharp.Host\\\\Endpoint\\\\EndpointHandler.cs:line 131\\r\\n--- End of stack trace from previous location where exception was thrown ---\\r\\n in System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\\r\\n in System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\\r\\n in OmniSharp.Stdio.Host.<HandleRequest>d__13.MoveNext() in D:\\\\a\\\\1\\\\s\\\\src\\\\OmniSharp.Stdio\\\\Host.cs:line 215\"", "Body": null, "Seq": 56, "Type": "response" } [fail]: OmniSharp.Stdio.Host ************ Response ************ { "Request_seq": 30, "Command": "/v2/highlight", "Running": true, "Success": false, "Message": "\"System.ArgumentOutOfRangeException: Specified argument was out of the range of valid values.\\r\\nParameter name: line\\r\\n in Microsoft.CodeAnalysis.Text.LinePosition..ctor(Int32 line, Int32 character)\\r\\n in OmniSharp.Roslyn.CSharp.Services.SemanticHighlight.SemanticHighlightService.<Handle>d__1.MoveNext() in D:\\\\a\\\\1\\\\s\\\\src\\\\OmniSharp.Roslyn.CSharp\\\\Services\\\\SemanticHighlight\\\\SemanticHighlightService.cs:line 36\\r\\n--- End of stack trace from previous location where exception was thrown ---\\r\\n in System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\\r\\n in System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\\r\\n in OmniSharp.Endpoint.EndpointHandler2.d__19.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n in System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n in System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n in OmniSharp.Endpoint.EndpointHandler2.<HandleRequestForLanguage>d__20.MoveNext() in D:\\\\a\\\\1\\\\s\\\\src\\\\OmniSharp.Host\\\\Endpoint\\\\EndpointHandler.cs:line 230\\r\\n--- End of stack trace from previous location where exception was thrown ---\\r\\n in System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\\r\\n in System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\\r\\n in OmniSharp.Endpoint.EndpointHandler2.d__16.MoveNext() in D:\\a\\1\\s\\src\\OmniSharp.Host\\Endpoint\\EndpointHandler.cs:line 131\r\n--- End of stack trace from previous location where exception was thrown ---\r\n in System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n in System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n in OmniSharp.Stdio.Host.d__13.MoveNext() in D:\\a\\1\\s\\src\\OmniSharp.Stdio\\Host.cs:line 215"",
"Body": null,
"Seq": 79,
"Type": "response"
}
[fail]: OmniSharp.Stdio.Host
************ Response ************
{
"Request_seq": 54,
"Command": "/v2/highlight",
"Running": true,
"Success": false,
"Message": ""System.ArgumentOutOfRangeException: Specified argument was out of the range of valid values.\r\nParameter name: character\r\n in Microsoft.CodeAnalysis.Text.LinePosition..ctor(Int32 line, Int32 character)\r\n in OmniSharp.Roslyn.CSharp.Services.SemanticHighlight.SemanticHighlightService.d__1.MoveNext() in D:\\a\\1\\s\\src\\OmniSharp.Roslyn.CSharp\\Services\\SemanticHighlight\\SemanticHighlightService.cs:line 36\r\n--- End of stack trace from previous location where exception was thrown ---\r\n in System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n in System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n in OmniSharp.Endpoint.EndpointHandler2.<GetFirstNotEmptyResponseFromHandlers>d__19.MoveNext()\\r\\n--- End of stack trace from previous location where exception was thrown ---\\r\\n in System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\\r\\n in System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\\r\\n in OmniSharp.Endpoint.EndpointHandler2.d__20.MoveNext() in D:\\a\\1\\s\\src\\OmniSharp.Host\\Endpoint\\EndpointHandler.cs:line 230\r\n--- End of stack trace from previous location where exception was thrown ---\r\n in System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n in System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n in OmniSharp.Endpoint.EndpointHandler`2.d__16.MoveNext() in D:\\a\\1\\s\\src\\OmniSharp.Host\\Endpoint\\EndpointHandler.cs:line 131\r\n--- End of stack trace from previous location where exception was thrown ---\r\n in System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n in System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n in OmniSharp.Stdio.Host.d__13.MoveNext() in D:\\a\\1\\s\\src\\OmniSharp.Stdio\\Host.cs:line 215"",
"Body": null,
"Seq": 196,
"Type": "response"
}

[stewartadam]

Likely related to OmniSharp/omnisharp-roslyn#909

[AquariusStar]

I looked at your other similar questions. This seems to be an old problem. The only thing I found in searching for a solution to the problem on various question branches is that there is a project switcher in the status bar. It works, of course. But this is a partial measure of the solution. If I jump between different projects, I will have to switch the active project for omnisharp every time and wait for the analysis to complete. I lose more time this way. Therefore, I have to work without using the configuration file.code-workspace.

[JoeRobich]

Closing as support for this is being tracked by OmniSharp/omnisharp-roslyn#909