Localization on attributes

[heischo]

[StringLength(3, ErrorMessage = "Name is too long")]

Can we use localization in such attributes, in a future ASP.NET Core version, without writing our own attributes?
I am thinking of a special keyword together with the localization name as a kind of placeholder, which is then filled with the correct value by the runtime:

[StringLength(3, ErrorMessage = localizationRef("TooLongErrorMessage"))]

[martincostello]

Have you tried the approaches documented here? https://learn.microsoft.com/aspnet/core/fundamentals/localization/make-content-localizable#dataannotations-localization

[heischo]

No. I will have a look at that. But I still think that having a separate keyword could make things a lot easier for us.

[martincostello]

A new language keyword would be a compiler feature, so would be outside the remit of the aspnetcore repo and would be for Roslyn.