Getting PartialMethodCompletionProvider errors

[lsilvand]

I'm getting a PartialMethodCompletionProvider error when trying to write a partial method to an ObservableProperty.
It appears if I try to tab complete "partial void On"(tab) or writing out OnStackMapImageChanged until the first parenthesis. I can continue to write it after the error and it will compile and run fine.

    [ObservableProperty]
    private WriteableBitmap _stackMapImage;
    partial void OnStackMapImageChanged(WriteableBitmap value) { }  <-- error

I've tried different versions of CommunityToolkit.MVVM, 8.0.0->8.4.0 and I know that it has worked before. I've also created new projects but it has the same problem. I'm thinking an update to Visual Studio created the problem but I'm not sure. I'm using version 17.13.6.
I don't know if this is a bug in Visual Studio, CommunityToolkit, or in the user.

Any help would be appreciated as it is a bit annoying.

The stack trace:
System.ArgumentException : keyword
at Microsoft.CodeAnalysis.CSharp.SyntaxFactory.PredefinedType(SyntaxToken keyword)
at Microsoft.CodeAnalysis.CSharp.Syntax.PredefinedTypeSyntax.Update(SyntaxToken keyword)
at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxRewriter.VisitPredefinedType(PredefinedTypeSyntax node)
at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxRewriter.Visit(SyntaxNode node)
at Microsoft.CodeAnalysis.CSharp.Syntax.SyntaxReplacer.Replacer1.Visit(SyntaxNode node) at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxRewriter.VisitVariableDeclaration(VariableDeclarationSyntax node) at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxRewriter.Visit(SyntaxNode node) at Microsoft.CodeAnalysis.CSharp.Syntax.SyntaxReplacer.Replacer1.Visit(SyntaxNode node)
at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxRewriter.VisitFieldDeclaration(FieldDeclarationSyntax node)
at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxRewriter.Visit(SyntaxNode node)
at Microsoft.CodeAnalysis.CSharp.Syntax.SyntaxReplacer.Replacer1.Visit(SyntaxNode node) at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxRewriter.VisitListElement[TNode](TNode node) at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxRewriter.VisitList[TNode](SyntaxList1 list)
at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxRewriter.VisitClassDeclaration(ClassDeclarationSyntax node)
at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxRewriter.Visit(SyntaxNode node)
at Microsoft.CodeAnalysis.CSharp.Syntax.SyntaxReplacer.Replacer1.Visit(SyntaxNode node) at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxRewriter.VisitListElement[TNode](TNode node) at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxRewriter.VisitList[TNode](SyntaxList1 list)
at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxRewriter.VisitNamespaceDeclaration(NamespaceDeclarationSyntax node)
at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxRewriter.Visit(SyntaxNode node)
at Microsoft.CodeAnalysis.CSharp.Syntax.SyntaxReplacer.Replacer1.Visit(SyntaxNode node) at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxRewriter.VisitListElement[TNode](TNode node) at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxRewriter.VisitList[TNode](SyntaxList1 list)
at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxRewriter.VisitCompilationUnit(CompilationUnitSyntax node)
at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxRewriter.Visit(SyntaxNode node)
at Microsoft.CodeAnalysis.CSharp.Syntax.SyntaxReplacer.Replacer1.Visit(SyntaxNode node) at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxNode.ReplaceCore[TNode](IEnumerable1 nodes,Func3 computeReplacementNode,IEnumerable1 tokens,Func3 computeReplacementToken,IEnumerable1 trivia,Func3 computeReplacementTrivia) at Microsoft.CodeAnalysis.SyntaxNodeExtensions.ReplaceTokens[TRoot](TRoot root,IEnumerable1 tokens,Func`3 computeReplacementToken)
at async Microsoft.CodeAnalysis.Completion.Providers.AbstractMemberInsertingCompletionProvider.RemoveDestinationNodeAsync()
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at async Microsoft.CodeAnalysis.Completion.Providers.AbstractMemberInsertingCompletionProvider.DetermineNewDocumentAsync()
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at async Microsoft.CodeAnalysis.Completion.Providers.AbstractMemberInsertingCompletionProvider.GetChangeAsync()
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at async Microsoft.CodeAnalysis.Extensions.IExtensionManagerExtensions.PerformFunctionAsyncT

[S5-CHRIS]

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________________________________ Od: lsilvand ***@***.***> Wysłane: niedziela, 4 maja 2025 18:28 Do: CommunityToolkit/dotnet ***@***.***> DW: Subscribed ***@***.***> Temat: [CommunityToolkit/dotnet] Getting PartialMethodCompletionProvider errors (Discussion #1080) I'm getting a PartialMethodCompletionProvider error when trying to write a partial method to an ObservableProperty. It appears if I try to tab complete "partial void On"(tab) or writing out OnStackMapImageChanged until the first parenthesis. I can continue to write it after the error and it will compile and run fine. [ObservableProperty] private WriteableBitmap _stackMapImage; partial void OnStackMapImageChanged(WriteableBitmap value) { } <-- error I've tried different versions of CommunityToolkit.MVVM, 8.0.0->8.4.0 and I know that it has worked before. I've also created new projects but it has the same problem. I'm thinking an update to Visual Studio created the problem but I'm not sure. I'm using version 17.13.6. I don't know if this is a bug in Visual Studio, CommunityToolkit, or in the user. Any help would be appreciated as it is a bit annoying. The stack trace: System.ArgumentException : keyword at Microsoft.CodeAnalysis.CSharp.SyntaxFactory.PredefinedType(SyntaxToken keyword) at Microsoft.CodeAnalysis.CSharp.Syntax.PredefinedTypeSyntax.Update(SyntaxToken keyword) at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxRewriter.VisitPredefinedType(PredefinedTypeSyntax node) at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxRewriter.Visit(SyntaxNode node) at Microsoft.CodeAnalysis.CSharp.Syntax.SyntaxReplacer.Replacer1.Visit(SyntaxNode node) at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxRewriter.VisitVariableDeclaration(VariableDeclarationSyntax node) at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxRewriter.Visit(SyntaxNode node) at Microsoft.CodeAnalysis.CSharp.Syntax.SyntaxReplacer.Replacer1.Visit(SyntaxNode node) at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxRewriter.VisitFieldDeclaration(FieldDeclarationSyntax node) at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxRewriter.Visit(SyntaxNode node) at Microsoft.CodeAnalysis.CSharp.Syntax.SyntaxReplacer.Replacer1.Visit(SyntaxNode node) at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxRewriter.VisitListElement[TNode](TNode node) at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxRewriter.VisitList[TNode](SyntaxList1 list) at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxRewriter.VisitClassDeclaration(ClassDeclarationSyntax node) at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxRewriter.Visit(SyntaxNode node) at Microsoft.CodeAnalysis.CSharp.Syntax.SyntaxReplacer.Replacer1.Visit(SyntaxNode node) at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxRewriter.VisitListElement[TNode](TNode node) at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxRewriter.VisitList[TNode](SyntaxList1 list) at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxRewriter.VisitNamespaceDeclaration(NamespaceDeclarationSyntax node) at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxRewriter.Visit(SyntaxNode node) at Microsoft.CodeAnalysis.CSharp.Syntax.SyntaxReplacer.Replacer1.Visit(SyntaxNode node) at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxRewriter.VisitListElement[TNode](TNode node) at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxRewriter.VisitList[TNode](SyntaxList1 list) at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxRewriter.VisitCompilationUnit(CompilationUnitSyntax node) at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxRewriter.Visit(SyntaxNode node) at Microsoft.CodeAnalysis.CSharp.Syntax.SyntaxReplacer.Replacer1.Visit(SyntaxNode node) at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxNode.ReplaceCore[TNode](IEnumerable1 nodes,Func3 computeReplacementNode,IEnumerable1 tokens,Func3 computeReplacementToken,IEnumerable1 trivia,Func3 computeReplacementTrivia) at Microsoft.CodeAnalysis.SyntaxNodeExtensions.ReplaceTokens[TRoot](TRoot root,IEnumerable1 tokens,Func`3 computeReplacementToken) at async Microsoft.CodeAnalysis.Completion.Providers.AbstractMemberInsertingCompletionProvider.RemoveDestinationNodeAsync() at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at async Microsoft.CodeAnalysis.Completion.Providers.AbstractMemberInsertingCompletionProvider.DetermineNewDocumentAsync() at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at async Microsoft.CodeAnalysis.Completion.Providers.AbstractMemberInsertingCompletionProvider.GetChangeAsync() at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at async Microsoft.CodeAnalysis.Extensions.IExtensionManagerExtensions.PerformFunctionAsyncT<Unknown%20Parameters> — Reply to this email directly, view it on GitHub<#1080>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/AMHDTFOC2Q5WMJA2HZ5CGR324Y5ZVAVCNFSM6AAAAAB4NB5QKOVHI2DSMVQWIX3LMV43ERDJONRXK43TNFXW4OZYGI3TQOBUGU>. You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>