C# 11.0

Highlights

• Required members: required keyword to enforce initialization
• Raw string literals: """multi-line strings without escaping"""
• Generic math: static abstract members in interfaces
• List patterns: [1, 2, .. var rest]
• UTF-8 string literals: “text”u8
• File-local types: file class Helpers { }
• Ref fields and scoped ref: ref struct improvements
• Pattern match span on string