.NET框架类命名空间

Microsoft.CSharp

Microsoft.VisualBasic

Microsoft.Win32

System

System.CodeDom

System.CodeDom.Compiler

System.Collections

System.Collections.Specialized

System.ComponentModel

System.ComponentModel.Design

System.ComponentModel.Design.Serialization

System.Configuration

System.Configuration.Assemblies

System.Data

System.Data.Common

System.Data.OleDb

System.Data.SqlClient

System.Data.SqlTypes

System.Diagnostics

System.Diagnostics.SymbolStore

System.DirectoryServices

System.Drawing

System.Drawing.Design

System.Drawing.Drawing2D

System.Drawing.Imaging

System.Drawing.Printing

System.Drawing.Text

System.Globalization

System.IO

System.IO.IsolatedStorage

System.Messaging

System.Messaging.Design

System.Net

System.Net.Sockets

System.Reflection

System.Reflection.Emit

System.Resources

System.Runtime.CompilerServices

System.Runtime.InteropServices

System.Runtime.InteropServices.Expando

System.Runtime.Remoting

System.Runtime.Remoting.Activation

System.Runtime.Remoting.Channels

System.Runtime.Remoting.Contexts

System.Runtime.Remoting.Lifetime

System.Runtime.Remoting.Messaging

System.Runtime.Remoting.Metadata

System.Runtime.Remoting.Metadata.W3cXsd2001

System.Runtime.Remoting.Proxies

System.Runtime.Remoting.Services

System.Runtime.Serialization

System.Runtime.Serialization.Formatters

System.Runtime.Serialization.Formatters.Binary

System.Security

System.Security.Cryptography

System.Security.Cryptography.X509Certificates

System.Security.Permissions

System.Security.Policy

System.Security.Principal

System.Text

System.Text.RegularExpressions

System.Threading

System.Timers

System.Web

System.Web.Caching

System.Web.Configuration

System.Web.Handlers

System.Web.Hosting

System.Web.Mail

System.Web.Security

System.Web.SessionState

System.Web.UI

System.Web.UI.HtmlControls

System.Web.UI.WebControls

System.Web.Util

System.Windows.Forms

System.Windows.Forms.ComponentModel.Com2Interop

System.Windows.Forms.Design

System.Windows.Forms.PropertyGridInternal

System.Xml

System.Xml.Schema

System.Xml.Serialization

System.Xml.XPath

System.Xml.Xsl

Classes in System

__ComObject Enum PlatformID

Activator Environment PlatformNotSupportedException

AppDomain EventArgs Random

AppDomainSetup EventHandler RankException

AppDomainUnloadedException Exception ResolveEventArgs

ApplicationException ExecutionEngineException ResolveEventHandler

ArgIterator FieldAccessException RuntimeArgumentHandle

ArgumentException FlagsAttribute RuntimeFieldHandle

ArgumentNullException FormatException RuntimeMethodHandle

ArgumentOutOfRangeException GC RuntimeTypeHandle

ArithmeticException Guid SByte

Array IndexOutOfRangeException SerializableAttribute

ArrayTypeMismatchException Int16 Single

AssemblyLoadEventArgs Int32 StackOverflowException

AssemblyLoadEventHandler Int64 STAThreadAttribute

AsyncCallback IntPtr String

Attribute InvalidCastException SystemException

AttributeTargets InvalidOperationException ThreadStaticAttribute

AttributeUsageAttribute InvalidProgramException TimeSpan

BadImageFormatException LoaderOptimization TimeZone

BitConverter LoaderOptimizationAttribute Type

Boolean LocalDataStoreSlot TypeCode

Buffer MarshalByRefObject TypedReference

Byte Math TypeInitializationException

CannotUnloadAppDomainException MemberAccessException

TypeLoadException

Char MethodAccessException TypeUnloadedException

CharEnumerator MissingFieldException UInt16

CLSCompliantAttribute MissingMemberException UInt32

Console MissingMethodException UInt64

ContextBoundObject MTAThreadAttribute UIntPtr

ContextMarshalException MulticastDelegate UnauthorizedAccessException

ContextStaticAttribute MulticastNotSupportedException

UnhandledExceptionEventArgs

Convert NonSerializedAttribute UnhandledExceptionEventHandler

CrossAppDomainDelegate NotFiniteNumberException Uri

DateTime NotImplementedException UriBuilder

DayOfWeek NotSupportedException UriFormatException

DBNull NullReferenceException UriHostNameType

Decimal Object UriPartial

Delegate ObjectDisposedException ValueType

DivideByZeroException ObsoleteAttribute Version

DllNotFoundException OperatingSystem Void

Double OutOfMemoryException WeakReference

DuplicateWaitObjectException OverflowException

EntryPointNotFoundException ParamArrayAttribute

Interfaces in System

_AppDomain ICloneable ICustomFormatter IFormattable

IAppDomainSetup IComparable IDisposable IServiceProvider

IAsyncResult IConvertible IFormatProvider