【正文】 比 C 和 C++ 簡單，比 Java 更為靈活。 CLR 是 Microsoft 的公共語言基礎(chǔ)結(jié)構(gòu) (CLI) 的一個商業(yè)實現(xiàn)。程序集包含清單，它提供關(guān)于程序集的類型、版本、區(qū)域性和安全要求等信息。由 CLR 執(zhí)行的代碼有時稱為 “ 托管代碼 ” ，它與編譯為面向特定系統(tǒng)的本機機器語言的 “ 非 托管代碼 ” 相對應(yīng)。單一程序集可能包含用不同 .NET 語言編寫的多個模塊，并且類型可以相互引用，就像它們是用同一種語言編寫的。s global information exchange and sharing funding source in the establishment of contacts and provide more channels and possible. Homes will be known world affairs, according few keyboard or a few 10 mouse clicks can be distant friends thousands of miles away exchanges, and online munications, Inter browsing, online interactive, emerce has bee a modern part of people39。 (3) Home design to be reasonable. Home to the first impression left by visitors is important, the design must be attractive in order to have a good visual effect. The contents of the website and function The content of the web site is to be a new, fast, all three sides. The content of the website, including the type of static, dynamic, functional and things to deal with. Website content is determined in accordance with the nature of the site, in the design of the site, mercial websites, popular science site, pany websites, teaching and exchange websites, the content and style are different. We have established websites with the nature of these types of sites are not the same. The structure website (1) site structure。s homepage, you need to have more like CSS, javascript, CGI, and other web design technology. In building on the site of the CSS, javascript and other web design technology. CSS Application Design website (1) What is CSS? CSS is a style sheet (stylesheet) technology. Some of them called CSS (Cascading Stylesheet). (2) the bination of CSS and HTML form. Mode 1: The CSS content, as defined in the writing between the labels. Mode 2: CSS will be preserved as a separate text file, and then from labels to call. (3) CSS the web site of examples. The web site pages, and increase the following definition so that the pages show with special effects. Application Design website javascript javascript and the emergence of making information between users is not only a display and browse the relationship, but to achieve a realtime, dynamic, crossexpression. Thus based on the CGI static HTML pages will be to provide dynamic realtime information, and customer response to the operation of the Web pages replaced. javascript scripting is satisfy this demand arising from the language. It39。s properties and content in the visual design tool. Introduction to the C Language and the .NET Framework C is an elegant and typesafe objectoriented language that enables developers to build a wide range of secure and robust applications that run on the .NET Framework. You can use C to create traditional Windows client applications, XML Web services, distributed ponents, clientserver applications, database applications, and much, much more. Microsoft Visual C 2021 provides an advanced code editor, convenient user interface designers, integrated debugger, and many other tools to facilitate rapid application development based on version of the C language and the .NET Framework. Note The Visual C documentation assumes that you have an understanding of basic programming concepts. If you are a plete beginner, you might want to explore Visual C Express Edition, which is available on the Web. You can also take advantage of any of several excellent books and Web resources on C to learn practical programming skills. 18 C syntax is highly expressive, yet with less than 90 keywords, it is also simple and easy to learn. The curlybrace syntax of C will be instantly recognizable to anyone familiar with C, C++ or Java. Developers who know any of these languages are typically able to begin working productively in C within a very short time. C syntax simplifies many of the plexities of C++ while providing powerful features such as nullable value types, enumerations, delegates, anonymous methods and direct memory access, which are not found in Java. C also supports generic methods and types, which provide increased type safety and performance, and iterators, which enable implementers of collection classes to define custom iteration behaviors that are simple to use by client code. As an objectoriented language, C supports the concepts of encapsulation, inheritance and polymorphism. All variables and methods, including the Main method, the application39。s types, version, culture, and security requirements. When the C program is executed, the assembly is loaded into the CLR, which might take various actions based on the information in the manifest. Then, if the security requirements are met, the CLR performs just in time (JIT) pilation to convert the IL code into native machine instructions. The CLR also provides other services related to automatic garbage collection, exception handling, and resource management. Code that is executed by the CLR is sometimes referred to as managed code, in contrast to unmanaged code which is piled into native machine language that targets a specific system. The following diagram illustrates the piletime and run time relationships of C source code files, the base class libraries, assemblies, and the CLR. 20 Language interoperability is a key feature of the .NET Framework. Because the IL code produced by the C piler conforms to the Common Type Specification (CTS), IL code generated from C can interact with code that was generated from the .NET versions of Visual Basic, Visual C++, Visual J, or any of more than 20 other CTSpliant languages. A single assembly may contain multiple modules written in different .NET languages, and the types can reference each other just as if they were written in the same language. In addition to the run time services, the .NET Fra