Fix occurrence of IDE0028 for a c# Dictionary causes compile error CS9215

[vsfeedback]

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

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[regression] [worked-in:17.12.0]
In 17.13.0 Preview 1.0 visual studio suggests a fix for IDE0028 "Collection initialization can be simplified" for the following dotnet8 code

From:

Dictionary<string, string> a = [];
Dictionary<string, string> b = new(a);

To:

Dictionary<string, string> a = [];
Dictionary<string, string> b = [.. a];

This causes the error CS9215 "Collection expression type 'Dictionary<string, string>' must have an instance or extension method 'Add' that can be called with a single argument"

I checked 17.12.0 and this same code does not create an intellisense message or suggest the erroneous fix in this way.

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Original Comments

Feedback Bot on 11/12/2024, 09:10 PM:

We have directed your feedback to the appropriate engineering team for further evaluation. The team will review the feedback and notify you about the next steps.

Feedback Bot on 11/13/2024, 06:38 AM:

This issue is currently being investigated. Our team will get back to you if either more information is needed, a workaround is available, or the issue is resolved.

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