The layer on top of the CLR is a set of framework base classes, followed by an additional layer of data and XML classes, plus another layer of classes intended for web services, web forms, and Windows forms. Collectively, these classes are known as the Framework Class Library (FCL), one of the largest class libraries in history and one that provides an object-oriented API to all the functionality that the .NET platform encapsulates. With more than 5,000 classes, the FCL facilitates rapid development of desktop, client/server, and other web services and applications. The set of framework base classes, the lowest level of the FCL, is similar to the set of classes in Java. These classes support rudimentary input and output, string manipulation, security management, network communication, thread management, text manipulation, reflection and collections functionality, etc. Above this level is a tier of classes that extend the base classes to support data management and XML manipulation. The data classes support persistent management of data that is maintained on backend databases. These classes include the Structured Query Language (SQL) classes to let you manipulate persistent data stores through a standard SQL interface. Additionally, a set of classes called ADO.NET allows you to manipulate persistent data. The .NET Framework also supports a number of classes to let you manipulate XML data and perform XML searching and translations. Extending the framework base classes and the data and XML classes is a tier of classes geared toward building applications using three different technologies: Web Services, Web Forms, and Windows Forms. Web Services include a number of classes that support the development of lightweight distributed components, which will work even in the face of firewalls and NAT software. Because Web Services employ standard HTTP and SOAP as underlying communications protocols, these components support plug-and-play across cyberspace. Web Forms and Windows Forms allow you to apply Rapid Application Development techniques to building web and Windows applications. Simply drag and drop controls onto your form, double click a control, and write the code to respond to the associated event.
. NET Framework architecture:
The layer on top of the CLR is a set of framework base classes, followed by an additional layer of data and XML classes, plus another layer of classes intended for web services, web forms, and Windows forms. Collectively, these classes are known as the Framework Class Library (FCL), one of the largest class libraries in history and one that provides an object-oriented API to all the functionality that the .NET platform encapsulates. With more than 5,000 classes, the FCL facilitates rapid development of desktop, client/server, and other web services and applications. The set of framework base classes, the lowest level of the FCL, is similar to the set of classes in Java. These classes support rudimentary input and output, string manipulation, security management, network communication, thread management, text manipulation, reflection and collections functionality, etc. Above this level is a tier of classes that extend the base classes to support data management and XML manipulation. The data classes support persistent management of data that is maintained on backend databases. These classes include the Structured Query Language (SQL) classes to let you manipulate persistent data stores through a standard SQL interface. Additionally, a set of classes called ADO.NET allows you to manipulate persistent data. The .NET Framework also supports a number of classes to let you manipulate XML data and perform XML searching and translations. Extending the framework base classes and the data and XML classes is a tier of classes geared toward building applications using three different technologies: Web Services, Web Forms, and Windows Forms. Web Services include a number of classes that support the development of lightweight distributed components, which will work even in the face of firewalls and NAT software. Because Web Services employ standard HTTP and SOAP as underlying communications protocols, these components support plug-and-play across cyberspace. Web Forms and Windows Forms allow you to apply Rapid Application Development techniques to building web and Windows applications. Simply drag and drop controls onto your form, double click a control, and write the code to respond to the associated event.
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