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First, the async keyword indicates to C# that the method is asynchronous, meaning that it may use an arbitrary number of await expressions and will bind the result to a promise. [1]: 165–168 The return type, Task<T>, is C#'s analogue to the concept of a promise, and here is indicated to have a result value of type int.
Alternatives are synchronous method invocation and future objects. [4] An example for an application that may make use of AMI is a web browser that needs to display a web page even before all images are loaded. Since method is a special case of procedure, asynchronous method invocation is a special case of asynchronous procedure call.
C# (/ ˌ s iː ˈ ʃ ɑːr p / see SHARP) [b] is a general-purpose high-level programming language supporting multiple paradigms.C# encompasses static typing, [16]: 4 strong typing, lexically scoped, imperative, declarative, functional, generic, [16]: 22 object-oriented (class-based), and component-oriented programming disciplines.
Whether it is a console or a graphical interface application, the program must have an entry point of some sort. The entry point of a C# application is the Main method. There can only be one declaration of this method, and it is a static method in a class. It usually returns void and is passed command-line arguments as an array of strings.
The observer design pattern is a behavioural pattern listed among the 23 well-known "Gang of Four" design patterns that address recurring design challenges in order to design flexible and reusable object-oriented software, yielding objects that are easier to implement, change, test and reuse.
A class accepts the objects it requires from an injector instead of creating the objects directly. — Yes — Factory method: Define an interface for creating a single object, but let subclasses decide which class to instantiate. Factory Method lets a class defer instantiation to subclasses. Yes Yes — Lazy initialization
When calling a Windows Runtime asynchronous function, the task is started on another thread or process and the function returns immediately, freeing the app to perform other tasks while waiting for results. [21] The asynchronous model requires new programming language constructs. Each language provides their own way to consume asynchronous APIs ...
The Task Parallel Library (TPL) is the task parallelism component of the Parallel Extensions to .NET. [6] It exposes parallel constructs like parallel For and ForEach loops, using regular method calls and delegates, thus the constructs can be used from any CLI languages.