Download A Programmer's Introduction to C# by Eric Gunnerson PDF

By Eric Gunnerson

C# is the main language for Microsoft's subsequent new release of home windows prone, the .NET platform. This new programming language is speedy and glossy and was once designed to extend programmer productiveness. C# allows programmers to fast construct quite a lot of functions for the recent Microsoft .NET platform. The .Net platform allows builders to construct C# elements to turn into internet prone to be had around the web. utilizing C# language constructs, those elements might be switched over into internet prone, letting them be invoked around the web. Gunnerson's publication is designed as a finished reference for specialist programmers to aid get them in control on C#. The writer is a lead developer on Microsoft's C# improvement staff, and has logged many developer hours writing and trying out C# code. As such, he is uniquely poised to educate builders the powerful use of this new language. A Microsoft insider, Gunnerson is usually in a position to clarify to readers how C# matches into Microsoft's new .NET framework. a last component of the publication presents a heritage of C#, and a language comparability to different commonly used programming languages. Gunnerson's booklet offers a origin upon which programmers can start to strengthen in C#. one of the middle themes coated are the COM+ surroundings, statements and movement of execution, periods, structs, interfaces, expressions, arrays, enums, delegates and occasions, exception dealing with, interoperability, and chosen complicated themes.

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Overloading Sometimes it may be useful to have two functions that do the same thing but take different parameters. This is especially common for constructors, when there may be several ways to create a new instance. y; } int x; int y; } class Test { public static void Main() { Point myPoint = new Point(10, 15); Point mySecondPoint = new Point(myPoint); } } The class has two constructors; one that can be called with x and y values, and one that can be called with another point. The Main() function uses both constructors; one to create an instance from an x and y value, and another to create an instance from an already-existing instance.

It is primarily useful to prevent unintended derivation. // error sealed class MyClass { MyClass() {} } class MyNewClass : MyClass { } - 50 - This fails because MyNewClass can’t use MyClass as a base class because MyClass is sealed. Chapter 7: Class Member Accessibility Overview ONE OF THE IMPORTANT DECISIONS to make when designing an object is how accessible to make the members. In C#, accessibility can be controlled in several ways. Class Accessibility The coarsest level at which accessibility can be controlled is at the class.

But making them normal public members doesn’t work either, since anybody could change the red value to olive drab, or puce. The readonly modifier is designed for exactly that situation. By applying readonly, the value can be set in the constructor or in an initializer, but can’t be modified later. Because the color values belong to the class and not a specific instance of the class, they’ll be initialized in the static constructor. Red; } } This provides the correct behavior. If the number of static members was high or creating them was expensive (either in time or memory), it might make more sense to declare them as readonly properties, so that members could be constructed on the fly as needed.

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