Professional

Ellipse class
for structures, 209
writing, 235
default keyword, 100, 426, 429
deferred evaluation, 487–490
definite assignment rule, 38
delegate keyword, 415
delegates, 439–454
accessing, 445–446
async modifier, 566
in Barrier constructor, 586
declaring, 447–451, 466
events, 456–465
examples, 441–443
implementing, 444–446, 451–454
initializing, 444–445, 466
invoking, 445, 456
lambda expressions and, 455–456
method adapters, 455
multiple methods, 445
public, 445
removing methods, 445
signatures, 455
DELETE requests, 728
delimiter characters, 104
dependencies, eliminating, 651–652, 698
Dequeue method, 370–372, 399–400, 404
derived classes, 256, 276. See also inheritance
abstract method overrides, 295, 298
override methods, 263–264
Deserialize Object method, 723
design
application, 337
code, 337
for multitasking, 519–520
design patterns
Command pattern, 669–680
Model-View-ViewModel pattern, 651–680
Design Patterns: Elements of Reusable Object-
Oriented Software (Gamma et al.), 455
Design View window, 21, 24. See also
Visual Studio 2015
destroying objects, 306
destructors, 306
calling Dispose method from, 314–316
creating, 317–318
finalization, 310
interfaces and, 284
overhead, 310–311
overlap, 311
restrictions on, 307
suppressing, 321
timing of running, 309–310
writing, 306–308, 325
developer mode for Windows 10, 18–19
devices. See also Universal Windows Platform (UWP)
apps
families, 602, 631
layout for narrow views, 632–635
Dictionary class, 375
Dictionary class, 400, 407–408, 416
thread-safe version, 587–588
Dispatcher objects, 563
DispatcherTimer class, 672
DispatcherTimer objects, 673
displayData method, 111–112
disposal methods, 311–324
exception-safe, 312, 316–324
in using statements, 312–314
Dispose method, 314, 319, 427–428
calling from destructor, 314–316
calling once, 320–323
thread safety and, 322–323
disposed field, 320–323
DistanceTo method, 165–166
Distinct method, 477, 480, 484
DivideByZeroException exceptions, 147, 555–556
dlg.ShowAsync method, 572
do statements, 116–125
stepping through, 120–124
writing, 117–119
doCancellationWork method, 556
documentation, comments, 11
Documents folder, 5
doIncrement method, 187–188
dollar sign ($), 46
dot notation, 158, 272
dot operator (.), 306
double quotation mark (“), 104
double.Parse method, 71
doubly linked lists, 403–404
doWork method, 161, 166, 181
duplicate code, 293–294. See also abstract classes
removing, 298–300
duplicate values, ignoring, 477, 480
E
Ellipse class, 289
757