Visual Studio 2026 Insiders - Razor formatter inserts an unwanted space before nullable marker inside component attribute: Guid? -> Guid ? #12445
Description
This issue has been moved from a ticket on Developer Community.
[severity:It's more difficult to complete my work] [regression] [worked-in:Visual Studio 2022 -17.4.17]
It worked in Visual Studio 2022 but, in Visual Studio 2026 Insiders the Razor formatter (Ctrl+K, D or Format Document) rewrites nullable value types inside generic component attributes by inserting a space before the question mark. Example: TValue="Guid?" becomes TValue="Guid ?". This did not happen in Visual Studio 2022.
This breaks consistency, is not aligned with any C# code style rule, and in some cases causes transient red squiggles in the editor (the tokenization briefly treats Guid and ? as separate).
Environment
• Visual Studio 2026 version : Insiders [11111.16]
• Project type: Blazor
• Language version: C# 13 (nullable enabled)
Exemple:
<RadzenDropDown TValue="Guid?"></RadzenDropDown> will become when pressing CTRL+K+D
<RadzenDropDown TValue="Guid ?"></RadzenDropDown>
Thank you !
Original Comments
Feedback Bot on 30/10/2025, 02:29 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.