C# 8.0

Highlights

• Nullable reference types: Opt-in static null-safety annotations
• Switch expressions: Concise, expression-bodied pattern matching switches
• Ranges and indices: ^1, .. operators
• Using declarations: using var stream = …;
• Readonly members: readonly on struct members
• Default interface methods
• Asynchronous streams: await foreach
• Null-coalescing assignment: x ??= y