[C# 13]: New Feature - Params collections

[BillWagner]

Visual Studio release

17.10p3

Link to speclet

• Speclet

Link to Pull request

• PR

New behavior

This feature relaxes restrictions on the type of parameters declared with the params modifier. Other collection types are now allowed: Span<T>, ReadOnlySpan<T>, IEnumerable<T>, and others.

Areas affected

• Add to What's new in C# 13: Add links to updated docs in the What's new in C# 13 article.
• Update language reference: Detail the areas in the language reference that will be updated for this feature.
• Update compiler messages: Add new (or updated) pages for new compiler messages. Include related message.
• Include in Everyday C# section*: Is this new feature included in Everyday C#?
• Tutorials: Are new tutorials required for this feature? If so, detail below

Language reference tasks

The page on the params keyword should be updated to include other items.

Tutorial tasks

No response

Everyday C# tasks

Add the new params capability when discussing params and the allowed signatures for Main. (Check the spec to see if Main is affected. Either way, we should make clear what the behavior is).

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Associated WorkItem - 230100

[BillWagner]

I added this to the March sprint. It may not be done this sprint, but if not, it should be done early in April to meet the next public preview.