O

Oak, 4

Object(s), 12, 109

creating, 111, 114–115, 127, 129

to methods, passing, 169–172

reflection for runtime instantiation of, using, 459–463

returning, 181–185

Object class, 607

object class, 299–303, 455, 483

methods defined by, table of, 299, 615

reference to value type, 300–302

Object initialization

with another object, 191–194

with constructor, 126–127

Object.Equals( ), 222

Object.HashCode( ), 222

Object-oriented programming (OOP), 4, 11–13

ObjectDisposedException, 372, 373, 787

Obsolete built-in attribute, 478, 480–481

One field, 582

One’s complement (unary NOT) operator (~), 73, 78–79

OpenRead( ), 800

OpenWrite( ), 800–801

operator keyword, 209

Operator overloading, 209–239, 531

binary, 209–212, 216–220

logical, 225–231

and overloading an operator method, 216–220

relational, 220–222

restrictions, 235–236

and true and false, 222–224, 227–231

unary, 209–210, 212–216

Operator(s)

arithmetic, 24, 63–67

arrow (−>), 537

assignment. See Assignment operator(s)

bitwise, 73–82

conversion. See Conversion operators

decrement. See Decrement operator (− −)

and generics, 532

implication, 69–70

increment. See Increment operator (++)

logical, 67–71, 225–231

methods, 209–210

parentheses and, 84

pointer, 535

precedence, table of, 84

relational, 27, 43, 67–68, 222–224

ternary (?), 82–83

OR operator (|)

bitwise, 73, 76–77

logical, 67, 68, 69–70, 71, 225–231

OR operator, short-circuit or conditional (||), 67, 70, 71, 225, 227–231

Or( ), 732

OrderedDictionary class, 733

out parameter modifier, 173, 174–177, 189, 210, 248, 256

OutOfMemoryException, 350

Overflow in arithmetic computations, 357

OverflowException, 350, 393

and checked and unchecked, 357–359

Overloading

constructors, 190–195, 531

indexers, 245–247, 531

methods, 185–190, 530–531

operators. See Operator overloading

override keyword, 287, 291

Overriding, method, 287–294

and dynamic method dispatch, 287–288