A

Anonymous types, 695, 701

as operator, 374

async

Main() method, 867, 922

return types, 864, 868

async/await support, 19

B

Binary values, 53

C

Constructor implementation, 300

D

Deconstructors, 309–310

Default values, 548

Delegate constraints, 558, 567

Delegates, 590

Digit separators, 52–53

dotnet CLI, 474

I

in modifier, 223

is operator, 155, 157, 365–366

L

Local functions, 882

N

.NET frameworks, 41

Null assignments to reference types, 88

Null checks, 155–157

Null-coalescing assignment, 155

Nullable reference types, 548

O

Operator overriding, 465

out argument, 78, 222–223

P

Pattern matching

is operator, 365–366

is null operator, 156

positional, 369

switch statements, 179, 372

private protected modifier, 481

Properties

getters and setters, 279

validation, 283

R

Read-only pass by reference, 223

Return by reference, 223–225

Return types, tuples, 207, 222–223

S

struct declarations, 423

switch statements, 179, 372

T

throw expressions, 512, 517

Tuples

anonymous type replacement, 91

example code, 94

generics, 550–551

introduced, 81

item names, 96, 98

method overriding, 463–464

return types, 207, 222–223

variable assignment, 92

U

Unmanaged constraints, 559

V

Versioning, 397–398