VB .NET Language in a Nutshell

Other Namespaces

Nested just below the System namespace are a number of second-level namespaces, which contain such classes as:

System.CodeDOM

Contains classes representing the elements and structure of a source code document.

System.Collections

Contains interfaces and classes that define various collections of objects, such as lists, queues, arrays, hashtables, and dictionaries.

System.ComponentModel

Contains classes that are used to implement the runtime and design-time behavior of components and controls.

System.Configuration

Contains classes that allow the creation of custom installers for software components.

System.Data

Consists mostly of the classes that constitute the ADO.NET architecture and are used for database connectivity.

System.Diagnostics

Contains classes that allow debugging of applications and code tracing.

System.DirectoryServices

Contains classes that provide access to the Active Directory from managed code.

System.Drawing

Contains classes that provide access to GDI+ basic graphics functionality. (More advanced functionality is provided in the System.Drawing.Drawing2D, System.Drawing.Imaging, and System.Drawing.Text namespaces.)

System.IO

Contains classes that allow synchronous and asynchronous reading from and writing to data streams and files.

System.Net

Contains classes that provide a simple programming interface to many of the common network protocols, such as FTP and HTTP. (The System.Net.Sockets namespace provides lower-level network access control.)

System.Reflection ...