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NET framework classes

The.NET Framework class library is a library of classes, interfaces, and value types that provide access to system functionality. It is the foundation on which.NET Framework applications, components, and controls are built. The namespaces and namespace categories in the class library are listed in the following table and documented in detail in this reference. The namespaces and categories are listed by usage, with the most frequently used namespaces appearing first.

Perhaps one of the biggest benefits of writing managed code, at least from a developer ’ s point of view, is that you get to use the.NET base class library. The.NET base classes are a massive collection of managed code classes that allow you to do almost any of the tasks that were previously available through the Windows API. These classes follow the same object model that IL uses, based on single inheritance. This means that you can either instantiate objects of whichever.NET base class is appropriate or derive your own classes from them.

The great thing about the.NET base classes is that they have been designed to be very intuitive and easy to use. For example, to start a thread, you call the Start() method of the Thread class. To disable a TextBox, you set the Enabled property of a TextBox object to false. This approach — though familiar to Visual Basic and Java developers, whose respective libraries are just as easy to use — will be a welcome relief to C++ developers, who for years have had to cope with such API functions as GetDIBits(), RegisterWndClassEx(), and IsEqualIID(), as well as a whole plethora of functions that require Windows handles to be passed around

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