How can I fix code folding in Visual Studio Code - visual-studio-code

Question

When opened, Visual Studio Code will show the appropriate vector symbols alongside the line number as usual, but once finished loading the vector symbols that indicate where one should be able to expand or collapse code are gone, and neither clicking the location, outline, nor shortcut keys have any effect. The vectors and ability to collapse folded code disappear at about the same time as a warning message in the lower right hand corner appears saying "Some projects have trouble loading. Please review the output for more details." Before that I am also getting an error message when things still work that says "Unable to start MSBuild language server (see the output window for details)." (The output window says:
Starting OmniSharp server at 2/4/2021, 3:58:32 PM\
Target: d:\Documents\<redacted> Collab\New Macabre Project\New Macabre Project.sln
OmniSharp server started.
Path: c:\Users\casto\.vscode\extensions\ms-dotnettools.csharp-1.23.8\.omnisharp\1.37.5\OmniSharp.exe
PID: 40184
[info]: OmniSharp.Stdio.Host
Starting OmniSharp on Windows 6.2.9200.0 (x64)
[info]: OmniSharp.Services.DotNetCliService
DotNetPath set to dotnet
[info]: OmniSharp.MSBuild.Discovery.MSBuildLocator
Located 2 MSBuild instance(s)
1: Visual Studio Enterprise 2017 15.9.28307.812 - "C:\Program Files (x86)\Microsoft Visual Studio\2017\Enterprise\MSBuild\15.0\Bin"
2: StandAlone 16.8.0 - "c:\Users\<redact>\.vscode\extensions\ms-dotnettools.csharp-1.23.8\.omnisharp\1.37.5\.msbuild\Current\Bin"
[warn]: OmniSharp.CompositionHostBuilder
It looks like you have Visual Studio lower than VS 2019 16.3 installed.
Try updating Visual Studio to the most recent release to enable better MSBuild support.
[info]: OmniSharp.MSBuild.Discovery.MSBuildLocator
MSBUILD_EXE_PATH environment variable set to 'c:\Users\<redact>\.vscode\extensions\ms-dotnettools.csharp-1.23.8\.omnisharp\1.37.5\.msbuild\Current\Bin\MSBuild.exe'
[info]: OmniSharp.MSBuild.Discovery.MSBuildLocator
Registered MSBuild instance: StandAlone 16.8.0 - "c:\Users\<redact>\.vscode\extensions\ms-dotnettools.csharp-1.23.8\.omnisharp\1.37.5\.msbuild\Current\Bin"
CscToolExe = csc.exe
CscToolPath = c:\Users\<redact>\.vscode\extensions\ms-dotnettools.csharp-1.23.8\.omnisharp\1.37.5\.msbuild\Current\Bin\Roslyn
MSBuildExtensionsPath = c:\Users\<redact>\.vscode\extensions\ms-dotnettools.csharp-1.23.8\.omnisharp\1.37.5\.msbuild
MSBuildToolsPath = c:\Users\<redact>\.vscode\extensions\ms-dotnettools.csharp-1.23.8\.omnisharp\1.37.5\.msbuild\Current\Bin
[info]: OmniSharp.Cake.CakeProjectSystem
Detecting Cake files in 'd:\Documents\<redact> Collab\New Macabre Project'.
[info]: OmniSharp.Cake.CakeProjectSystem
Could not find any Cake files
[info]: OmniSharp.MSBuild.ProjectSystem
Detecting projects in 'd:\Documents\<redact> Collab\New Macabre Project\New Macabre Project.sln'.
[info]: OmniSharp.MSBuild.ProjectManager
Queue project update for 'd:\Documents\<redact> Collab\New Macabre Project\New Macabre Project.csproj'
[info]: OmniSharp.Script.ScriptProjectSystem
Detecting CSX files in 'd:\Documents\<redact> Collab\New Macabre Project'.
[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: d:\Documents\<redact> Collab\New Macabre Project\New Macabre Project.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 'd:\Documents\<redact> Collab\New Macabre Project' on host 27768.
[fail]: OmniSharp.MSBuild.ProjectLoader
The reference assemblies for .NETFramework,Version=v4.7.2 were not found. To resolve this, install the Developer Pack (SDK/Targeting Pack) for this framework version or retarget your application. You can download .NET Framework Developer Packs at https://aka.ms/msbuild/developerpacks
[warn]: OmniSharp.MSBuild.ProjectManager
Failed to load project file 'd:\Documents\Al Petz Collab\New Macabre Project\New Macabre Project.csproj'.
d:\Documents\<redact> Collab\New Macabre Project\New Macabre Project.csproj
c:\Users\<redact>\.vscode\extensions\ms-dotnettools.csharp-1.23.8\.omnisharp\1.37.5\.msbuild\Current\Bin\Microsoft.Common.CurrentVersion.targets(1180,5): Error: The reference assemblies for .NETFramework,Version=v4.7.2 were not found. To resolve this, install the Developer Pack (SDK/Targeting Pack) for this framework version or retarget your application. You can download .NET Framework Developer Packs at https://aka.ms/msbuild/developerpacks
[fail]: OmniSharp.MSBuild.ProjectManager
Attempted to update project that is not loaded: d:\Documents\<redact> Collab\New Macabre Project\New Macabre Project.csproj
.) For the past couple of months I have been plighted MS language build errors, and while that might be causing me some trouble this code folding problem is new, and I have nothing to go on.

Answer 1

By seeing the message "It looks like you have Visual Studio lower than VS 2019 16.3 installed."
I tried to google, and I found this.
But in your context is not clear what you are doing and what kind of software you are building; please provide us ( the community ) with a bit more details on what and where you are creating your project (e.g. Unity its version or something else). You can try to google the required version for the engine or the framework you are using.
Please add some more details about the project.
Different engines/programs may require different versions of
Developer Pack or ".NET Core version".
That is why we can only make suggestions in this case.
First of all, I would suggest you close your IDE and do the following steps:
Go to dotnet.microsoft.com;
Download the Developer Pack .NET Framework 4.8 or .NET Framework 4.7.2 3(image down below);
Install the downloaded file and try again.
If it does not help you, you may try to update the Visuall Studio to the latest version as it hints to you.
Another way to solve the issues you may try to:
Click on "Build", which is in the top menu;
Click "Clean Solution";
Click "Rebuild Solution".