Use file-scoped namespace for new item template

[WeihanLi]

Currently, the file-scoped namespace feature had been supported, but when I create a new item(class/interface) with the latest Visual Studio 2022 Preview 4, the file-scoped namespace had not been applied, could file-scoped namespace be enabled for the new item template?

It may relate to #3359

[DavidKarlas]

I just tried with very latest "17.0.0 Preview 5.0 [31719.51]" and this works, but it is important to also add:

[*.{cs,vb}]
csharp_style_namespace_declarations=file_scoped:suggestion

to your .editorconfig file.

I hope this solves your problem.

[WeihanLi]

Thanks, great news