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Change Project C# Version

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Alejandro Scotti

Growing Member



Posts:27
Growing Member




9/29/2023 11:39 AM

    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(<Unknown Parameters>)
       at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
       at async Microsoft.CodeAnalysis.CodeActions.CodeActionEditHandlerService.ApplyAsync(<Unknown Parameters>)
       at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
       at async Microsoft.CodeAnalysis.Editor.Implementation.Suggestions.SuggestedAction.InvokeWorkerAsync(<Unknown Parameters>)
       at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
       at async Microsoft.CodeAnalysis.Extensions.IExtensionManagerExtensions.PerformActionAsync(<Unknown Parameters>)






    Will Strohl

    Senior Member



    Posts:1278
    Senior Member




    9/29/2023 1:58 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

      Will Strohl

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