A

Abstract classes, 357

Aggregation, 345

async returns, 880–881

Asynchronous streams, 854, 870, 872, 874

await using statement, 874

B

Buffer overflows, 110

C

Constraints, 561

Constructor overloading, 300

D

Delegate invocation, 630

I

Index from end operator, 99, 107, 108, 110, 112, 118

Interfaces

vs. abstract classes, 414

implementation, 377, 379–380, 386, 413–414

versioning, 396–411

is operator, 365

is { } property pattern, 157

N

.NET frameworks, 41

Non-nullable reference types, 293

Null assignment for reference types, 70–71

Null-coalescing assignment, 155, 158

Null-forgiving operator, 634

Nullable reference types

default values, 548

introduced, 70–71, 88

nullable modifier, 84

P

Pattern matching types, 366, 368

Positional pattern matching, 369

Property matching, 371

R

Ranges, 101, 111

Read-only struct members, 423

Resource cleanup, 499–500

Reverse accessing arrays, 100

S

String interpolation, 61

T

Task-based Asynchronous Pattern, 863

U

Unmanaged constraints, 560

using statement, 499