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2023年1月20日 · Compared to a star's entire history, the visual appearance of a supernova is very brief, sometimes spanning several months, so that the chances of observing one with the naked eye is roughly once in a lifetime. Only a tiny fraction of the 100 billion stars in a typical galaxy have the capacity to become a supernova, being restricted to those having high mass and rare kinds of binary stars ...
2 天前 · The Vortec 4800 LR4 (VIN code "V") is a Generation III small block V8 truck engine. Displacement is 4,806 cc (4.8 L; 293.3 cu in) with a bore and stroke of 96 mm × 83 mm (3.78 in × 3.27 in). It is the smallest of the Generation III Vortec truck engines and was the replacement for the 5.0 L 5000 L30.
- Design Goals
- Common Type System
- Standardization and Licensing
- Further Reading
- External Links
The Ecma standard lists these design goals for C#: 1. The language is intended to be a simple, modern, general-purpose, object-oriented programminglanguage. 2. The language, and implementations thereof, should provide support for software engineering principles such as strong type checking, array bounds checking, detection of attempts to use uninit...
During the development of the .NET Framework, the class libraries were originally written using a managed code compiler system called "Simple Managed C" (SMC). In January 1999, Anders Hejlsberg formed a team to build a new language at the time called Cool, which stood for "C-like Object Oriented Language". Microsoft had considered keeping the name ...
The core syntax of the C# language is similar to that of other C-style languages such as C, C++ and Java, particularly: 1. Semicolons are used to denote the end of a statement. 2. Curly brackets are used to group statements. Statements are commonly grouped into methods (functions), methods into classes, and classes into namespaces. 3. Variables are...
C# has a unified type system. This unified type system is called Common Type System(CTS). A unified type system implies that all types, including primitives such as integers, are subclasses of the System.Object class. For example, every type inherits a ToString()method.
The C# specification details a minimum set of types and class libraries that the compiler expects to have available. In practice, C# is most often used with some implementation of the Common Language Infrastructure (CLI), which is standardized as ECMA-335 Common Language Infrastructure (CLI). In addition to the standard CLI specifications, there ar...
The following is a very simple C# program, a version of the classic "Hello world" example: Using C# 9 Top-level statementsfeature the entry point logic of a program can be written without declaring an explicit type or Main method.Until C# 8 remains the classic way: This code will display this text in the console window: Each line has a purpose: The above line imports all types in the System namespace. For example, the Console class used later in the source code is defined in the Systemnamespa...
A GUIexample: This example is similar to the previous example, except that it generates a dialog boxthat contains the message "Hello, World!" instead of writing it to the console.
Another useful library is the System.Drawinglibrary, which is used to programmatically draw images. For example: This will create an image that is identical to that stored in "Image.png".
In August 2001, Microsoft Corporation, Hewlett-Packard and Intel Corporation co-sponsored the submission of specifications for C# as well as the Common Language Infrastructure (CLI) to the standards organization Ecma International.In December 2001, ECMA released ECMA-334 C# Language Specification. C# became an ISO standard in 2003 (ISO/IEC 23270:20...
Microsoft is leading the development of the open-source reference C# compilers and set of tools. The first compiler, Roslyn, compiles into intermediate language (IL), and the second one, RyuJIT, is a JIT (just-in-time) compiler, which is dynamic and does on-the-fly optimization and compiles the IL into native code for the front-end of the CPU. RyuJ...Drayton, Peter; Albahari, Ben; Neward, Ted (2002). C# Language Pocket Reference. O'Reilly. ISBN 0-596-00429-X.Petzold, Charles (2002). Programming Microsoft Windows with C#. Microsoft Press. ISBN 0-7356-1370-2.