System.IO.FileNotFoundException: Could not load file or assembly 'System.Collections.Immutable, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. The system cannot find the file specified.

[jeff922]

Using VS Code examples from C#9 and .NET 5 book. After installing MSBuild project tools 0.3.11, I get the following error and setup. Any ideas what might be causing the error? I'm new, so let me know if I need to provide additional details. Thanks.

PS C:\Users\jmurphy\Documents\VSCode\PracticalApps\NorthwindEntitiesLib> dotnet --list-sdks
5.0.102 [C:\Program Files\dotnet\sdk]
PS C:\Users\jmurphy\Documents\VSCode\PracticalApps\NorthwindEntitiesLib> dotnet --list-runtimes
Microsoft.AspNetCore.App 5.0.2 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.NETCore.App 3.1.11 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 5.0.2 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.WindowsDesktop.App 3.1.11 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 5.0.2 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
PS C:\Users\jmurphy\Documents\VSCode\PracticalApps\NorthwindEntitiesLib>

[Info - 2:29:04 PM] 1 package sources configured for project "c:\Users\jmurphy\Documents\VSCode\PracticalApps\NorthwindContextLib\NorthwindContextLib.csproj".
[Info - 2:29:04 PM] Locally-configured package source "nuget.org" (v3) => https://api.nuget.org/v3/index.json
[Error - 2:29:04 PM] Error loading MSBuild project '"c:\Users\jmurphy\Documents\VSCode\PracticalApps\NorthwindContextLib\NorthwindContextLib.csproj"'.
System.IO.FileNotFoundException: Could not load file or assembly 'System.Collections.Immutable, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. The system cannot find the file specified.
File name: 'System.Collections.Immutable, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'
at new Microsoft.Build.Evaluation.Context.EvaluationContext(SharingPolicy policy, IFileSystem fileSystem)
at EvaluationContext Microsoft.Build.Evaluation.Context.EvaluationContext.Create(SharingPolicy policy, MSBuildFileSystemBase fileSystem)
at void Microsoft.Build.Evaluation.Project+ProjectImpl.Reevaluate(ILoggingService loggingServiceForEvaluation, ProjectLoadSettings loadSettings, EvaluationContext evaluationContext)
at void Microsoft.Build.Evaluation.Project+ProjectImpl.ReevaluateIfNecessary(ILoggingService loggingServiceForEvaluation, ProjectLoadSettings loadSettings, EvaluationContext evaluationContext)
at void Microsoft.Build.Evaluation.Project+ProjectImpl.ReevaluateIfNecessary(ILoggingService loggingServiceForEvaluation, EvaluationContext evaluationContext)
at void Microsoft.Build.Evaluation.Project+ProjectImpl.ReevaluateIfNecessary(EvaluationContext evaluationContext)
at void Microsoft.Build.Evaluation.Project+ProjectImpl.Initialize(IDictionary<string, string> globalProperties, string toolsVersion, string subToolsetVersion, ProjectLoadSettings loadSettings, EvaluationContext evaluationContext)
at new Microsoft.Build.Evaluation.Project(string projectFile, IDictionary<string, string> globalProperties, string toolsVersion, string subToolsetVersion, ProjectCollection projectCollection, ProjectLoadSettings loadSettings, EvaluationContext evaluationContext)
at Project Microsoft.Build.Evaluation.ProjectCollection.LoadProject(string fileName, IDictionary<string, string> globalProperties, string toolsVersion)
at Project Microsoft.Build.Evaluation.ProjectCollection.LoadProject(string fileName, string toolsVersion)
at Project Microsoft.Build.Evaluation.ProjectCollection.LoadProject(string fileName)
at bool MSBuildProjectTools.LanguageServer.Documents.MasterProjectDocument.TryLoadMSBuildProject() in C:\Development\github\tintoy\msbuild-project-tools-vscode\lib\server\src\LanguageServer.Engine\Documents\MasterProjectDocument.cs:line 173

[Info - 2:32:02 PM] 1 package sources configured for project "c:\Users\jmurphy\Documents\VSCode\PracticalApps\NorthwindEntitiesLib\NorthwindEntitiesLib.csproj".
[Info - 2:32:02 PM] Locally-configured package source "nuget.org" (v3) => https://api.nuget.org/v3/index.json
[Error - 2:32:02 PM] Error loading MSBuild project '"c:\Users\jmurphy\Documents\VSCode\PracticalApps\NorthwindEntitiesLib\NorthwindEntitiesLib.csproj"'.
System.InvalidOperationException: Parent project does not have an MSBuild project.
at bool MSBuildProjectTools.LanguageServer.Documents.SubProjectDocument.TryLoadMSBuildProject() in C:\Development\github\tintoy\msbuild-project-tools-vscode\lib\server\src\LanguageServer.Engine\Documents\SubProjectDocument.cs:line 86

[tintoy]

Hi - thanks for reporting 🙂

I believe this is caused by the same issue as #21; would you be able to try installing the VSIX package linked in that issue and tell me if that new version of the extension fixes the problem for you?

[jeff922]

Thanks for the quick reply! Yes the VSIX file 0.3.12 fixed my issue also.

[tintoy]

Published v0.3.12 of the extension (which now targets 5.0).

Sorry for the delay; had to find time to set up VMs for testing with multiple versions :)