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Forums Using DNN Platform Administration and Configuration

Change Project C# Version

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Alejandro Scotti
Growing Member
Posts: 27
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9/29/2023 12:39 PM

Hello, I downloaded Registration.ascx.cs from the dnnsoftware/Dnn.Platform repo and I'm working to develop our own Registration Module and I'm getting the error that my c# version is too old.

The VS quick fix errors out... I followed Google fixes but I can't seemt to make it work.

Any help please? thank you

System.NullReferenceException : Object reference not set to an instance of an object.
   at Microsoft.VisualStudio.LanguageServices.Utilities.ProjectPropertyStorage.PerConfigurationPropertyStorage.SetProperty(String buildPropertyName,String configurationPropertyName,String value)
   at Microsoft.CodeAnalysis.Workspace.ApplyProjectChanges(ProjectChanges projectChanges)
   at Microsoft.CodeAnalysis.Workspace.TryApplyChanges(Solution newSolution,IProgressTracker progressTracker)
   at Microsoft.VisualStudio.LanguageServices.Implementation.ProjectSystem.VisualStudioWorkspaceImpl.TryApplyChanges(Solution newSolution,IProgressTracker progressTracker)
   at Microsoft.CodeAnalysis.CodeActions.ApplyChangesOperation.ApplyOrMergeChanges(Workspace workspace,Solution originalSolution,Solution changedSolution,IProgressTracker progressTracker,CancellationToken cancellationToken)
   at Microsoft.CodeAnalysis.CodeActions.ApplyChangesOperation.TryApplyAsync(Workspace workspace,Solution originalSolution,IProgressTracker progressTracker,CancellationToken cancellationToken)
   at async Microsoft.CodeAnalysis.CodeActions.CodeActionEditHandlerService.ProcessOperationsAsync()
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at async Microsoft.CodeAnalysis.CodeActions.CodeActionEditHandlerService.ApplyAsync()
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at async Microsoft.CodeAnalysis.Editor.Implementation.Suggestions.SuggestedAction.InvokeWorkerAsync()
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at async Microsoft.CodeAnalysis.Extensions.IExtensionManagerExtensions.PerformActionAsync()

Will Strohl
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9/29/2023 2:58 PM

I believe that you need to fix this in your Visual Studio project file.  You can do this by directly editing the project file in your favorite text editor, or Unload the project in Visual Studio and then edit it there.  

https://stackoverflow.com...n-visual-studio-2019

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