[C# 15-Fundamentals and reference]: New Feature - Improved memory safety

[BillWagner]

.NET 11 Preview

.NET 11 Preview 5

Link to speclet

• Speclet

Link to Pull request

• PR

New behavior

There are a number of PRs on this journey, so I didn't call out just one.

This is primarily a runtime feature, so the language reference changes are around how to manage the changes in the unsafe keyword's semantics. In addition, any new attributes that are added for annotating APIs should be documented.

Language reference tasks

• Document how to switch between old and new models of safety.
• Full semantics on the new meaning of unsafe both for a block and for a member (or local function).
• Point to preview status, and how and when it will be enabled in the runtime.

Everyday C# tasks

No response

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Associated WorkItem - 582359