Common namespaces and meanings for ASP

The

Using system;//introduces a core namespace, which is the basis for all classes
using system.collections.generic;//introduces a collection class namespace that enables you to use a collection class such as a generic class
using System.componentmodel;//introduces the ComponentModel namespace
using system.data;//introduces a data manipulation namespace that can use a dataset class
using system.drawing;//introduces a drawing namespace that enables you to use classes such as color---image  the
using system.text;//introduces a text manipulation namespace that can be used such as StringBuilder, such as character manipulation
using System.Windows.Forms;//introduction of form namespaces, support for form-related classes
using System.Text;//text operation
using Microsoft.Win32;
using System.Collections for registry operations;//use ArrayList
using system.security.cryptography;//encryption to decrypt
using System.IO;    //file Operation
using system.runtime.interopservices;//calling DLL DllImport
using System.Management;  // Get hardware information
using System.Net;      //Get an IP address using
using System.Net.NetworkInformation;    // The ping uses the
using System.Text.RegularExpressions;  /Regular
using SYSTEM.DATA.SQLCLIENT;//SQL database operation
Using Microsoft.VisualBasic;  //simplified to traditional use of
using System.Web;      //html Urlenco

ASP. Common namespaces and meanings