Addison Wesley Essential C Sharp 9 ppt

... contact to item could use a cast operator as follows: item = (PdaItem)contact; or even when no cast is necessary: contact = (Contact)contact; PdaItem item = contact; contact = (Contact)item; From ... public class Program { public static void Main() { Contact contact = new Contact(); // } } public class Contact : PdaItem contact.Name = "Inigo Montoya"; Figure 6.1: Refac...

Ngày tải lên: 19/06/2014, 22:20

... jitting can add a com- pile step to the execution process, code efficiencies that a jitter can insert lead to performance rivaling that of programs compiled directly to machine code. Ultimately, CLI ... user-defined warnings // The TicTacToe class enables two players to // play tic-tac-toe. class TicTacToeGame // Declares the TicTacToeGame class { static void Main() // Declares the entr...

Ngày tải lên: 19/06/2014, 22:20

... that inaccuracies can occur with a simple assignment, such as dou- ble number = 140.6F. Since the double can hold a more accurate value than the float can store, the C# compiler will actually ... significant digits that a float can hold. This type of rounding can become significant, especially with repeated calculations or checks for equality (see the upcoming Advanced Topic, Unexpected...

Ngày tải lên: 19/06/2014, 22:20

... catch block, is equivalent to specifying a catch block that takes an object data type: for instance, catch(object exception){ }. And since all classes ultimately derive from object, a catch ... (a common occurrence when accessing Microsoft COM libraries), using the named parameter syntax is certainly a convenience. However, notice that along with the convenience comes an impact on ... e...

Ngày tải lên: 19/06/2014, 22:20

... break; case 2: // break; case 3: // break; } ConnectionState connectionState; // switch (connectionState) { case ConnectionState.Connected: // break; case ConnectionState.Connecting: ... Disconnected, Connecting = 10, Connected, Joined = Connected, Disconnecting } Disconnected has a default value of 0, Connecting has been explicitly assigned 10, and consequently, Con...

Ngày tải lên: 19/06/2014, 22:20

... // } Because a base class constraint requires a particular base class, using struct or class with a base class constraint would be pointless, and in fact could allow for conflicting constraints. ... } class Program { static void Main() { // Allowed in C# 4.0 Pair<Contact> contacts = new Pair<Contact>( new Contact("Princess Buttercup"), new Contact("In...

Ngày tải lên: 19/06/2014, 22:20

... Compiled Result of foreach on Collections System.Collections.Generic.Stack<int> stack = new System.Collections.Generic.Stack<int>(); System.Collections.Generic.Stack<int>.Enumerator ... in both collections to start. Concat() Combines two collections together to form a superset of both collections. Duplicate items are not removed from the resultant collection. Concat()w...

Ngày tải lên: 19/06/2014, 22:20

... list control that displays a collection of objects. Given the collection, a list control could use reflection to iterate over all the proper- ties of an object in the collection, defining a column ... (added in C# 4.0). Named parameters provide a mechanism for setting specific public properties and fields within the attribute constructor call, even though the constructor includes no corr...

Ngày tải lên: 19/06/2014, 22:20

... 19. 4. * Collection classes that implement IProducerConsumerCollection<T>. A common pattern enabled by concurrent collections is support for thread-safe access by producers and consumers. Classes ... Classes Collection Class Description BlockingCollection<T> Provides a blocking collection that enables producer/consumer scenarios in which producers write data into the collecti...

Ngày tải lên: 19/06/2014, 22:20

... chứa nội dung th c thi chương trình ho c c c thư viện động. Assembly c thể đư c chứa trong nhiều file. Assembly c ng c thể chứa metadata dùng để mô tả c c kiểu và phương th c đư c định nghĩa ... chứa phần mềm và chỉ đư c dùng cho phần mềm đó. Với phần mô tả này bạn c thể chứa đựng c c private assemblie cung c p cho một ứng dụng kiểu th c thi và một số thư việ n, c c thư...

Ngày tải lên: 15/12/2013, 02:15