Dns Class (System.Net)

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Microsoft Visual Studio 2008/.NET Framework 3.5

Other versions are also available for the following:

.NET Framework Class Library

Dns Class

Provides simple domain name resolution functionality.

Namespace: System.Net
Assembly: System (in System.dll)

Syntax

Visual Basic (Declaration)

Public NotInheritable Class Dns

Visual Basic (Usage)

You do not need to declare an instance of a static class in order to access its members.

public static class Dns

Visual C++

public ref class Dns abstract sealed

JScript

public final class Dns

Remarks

The Dns class is a static class that retrieves information about a specific host from the Internet Domain Name System (DNS).

The host information from the DNS query is returned in an instance of the IPHostEntry class. If the specified host has more than one entry in the DNS database, IPHostEntry contains multiple IP addresses and aliases.

Examples

The following example queries the DNS database for information on the host www.contoso.com.

Visual Basic

Dim hostInfo As IPHostEntry = Dns.GetHostByName("www.contoso.com")

IPHostEntry hostInfo = Dns.GetHostByName("www.contoso.com");

Visual C++

IPHostEntry^ hostInfo = Dns::GetHostByName( "www.contoso.com" );

Inheritance Hierarchy

System..::.Object
System.Net..::.Dns

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Platforms

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Version Information

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

Reference

Dns Members

System.Net Namespace