RefactoringError in Visual Studio when adding a tuple in a standard for-next-loop

[vsfeedback]

This issue has been moved from a ticket on Developer Community.

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[severity:It bothers me. A fix would be nice]
Environment
I have a WinForms-.NET-FX 4.8.1 VB. NET-project in Visual Studio Version 18.0.2 with November 2025 Featureupdate on a 64-bit Win11 PC, but it also happens in a WinForms-.NET 10.0 VB. NET-project and using Option Strict On. I am using Option Strict On and the german language pack, because some problems seem to be language specific.

Problem description
I want to add a tuple to a list inside of a classic for loop.

Private Sub Test()
	Dim Foo As New List(Of String) From {"Bar", "Baz"}
	Dim ValuePacksAsTuples As New List(Of (Index As Integer, Value As Integer))
	For i = 0 To Foo.Count - 1
		ValuePacksAsTuples.Add((i, 1))
	Next
End Sub
  

If I select the code line with the For i = 0, an error appears, mentioning the VisualBasicConvertForToForEachCodeRefactoringProvider

stack trace

System.InvalidCastException : Das Objekt des Typs "Microsoft.CodeAnalysis.VisualBasic.Syntax.TupleExpressionSyntax" kann nicht in Typ "Microsoft.CodeAnalysis.VisualBasic.Syntax.ArgumentListSyntax" umgewandelt werden.
   at Microsoft.CodeAnalysis.VisualBasic.LanguageService.VisualBasicSyntaxFacts.GetArgumentsOfArgumentList(SyntaxNode node)
   at Microsoft.CodeAnalysis.ConvertForToForEach.AbstractConvertForToForEachCodeRefactoringProvider`6.<>c__DisplayClass5_0. <ComputeRefactoringsAsync>g__IterationVariableIsUsedForMoreThanCollectionIndex|1(SyntaxNode current)
   at Microsoft.CodeAnalysis.ConvertForToForEach.AbstractConvertForToForEachCodeRefactoringProvider`6.<>c__DisplayClass5_0. <ComputeRefactoringsAsync>g__IterationVariableIsUsedForMoreThanCollectionIndex|1(SyntaxNode current)
   at Microsoft.CodeAnalysis.ConvertForToForEach.AbstractConvertForToForEachCodeRefactoringProvider`6.<>c__DisplayClass5_0. <ComputeRefactoringsAsync>g__IterationVariableIsUsedForMoreThanCollectionIndex|1(SyntaxNode current)
   at Microsoft.CodeAnalysis.ConvertForToForEach.AbstractConvertForToForEachCodeRefactoringProvider`6.<>c__DisplayClass5_0. <ComputeRefactoringsAsync>g__IterationVariableIsUsedForMoreThanCollectionIndex|1(SyntaxNode current)
   at Microsoft.CodeAnalysis.ConvertForToForEach.AbstractConvertForToForEachCodeRefactoringProvider`6.<>c__DisplayClass5_0. <ComputeRefactoringsAsync>g__IterationVariableIsUsedForMoreThanCollectionIndex|1(SyntaxNode current)
   at Microsoft.CodeAnalysis.ConvertForToForEach.AbstractConvertForToForEachCodeRefactoringProvider`6.<>c__DisplayClass5_0. <ComputeRefactoringsAsync>g__IterationVariableIsUsedForMoreThanCollectionIndex|1(SyntaxNode current)
   at Microsoft.CodeAnalysis.ConvertForToForEach.AbstractConvertForToForEachCodeRefactoringProvider`6.<>c__DisplayClass5_0. <ComputeRefactoringsAsync>g__IterationVariableIsUsedForMoreThanCollectionIndex|1(SyntaxNode current)
   at async Microsoft.CodeAnalysis.ConvertForToForEach.AbstractConvertForToForEachCodeRefactoringProvider`6.ComputeRefactoringsAsync[TStatementSyntax,TForStatementSyntax,TExpressionSyntax,TMemberAccessExpressionSyntax,TTypeNode,TVariableDeclaratorSyntax](<Unbekannte Parameter>)
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at async Microsoft.CodeAnalysis.CodeRefactorings.CodeRefactoringService.<>c__DisplayClass12_0. <GetRefactoringFromProviderAsync>b__0(<Unbekannte Parameter>)
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at async Microsoft.CodeAnalysis.Extensions.IExtensionManagerExtensions.PerformFunctionAsync[T](<Unbekannte Parameter>)

Video

[deepakrathore33]