Provides simple domain name resolution functionality.
Namespace: System.Net
Assembly: System (in system.dll)
Visual Basic (Declaration)
Public NotInheritable Class Dns
The members of a static class are accessed directly without an instance of the class.
public ref class Dns abstract sealed
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.
The following example queries the DNS database for information on the host www.contoso.com.
Dim hostInfo As IPHostEntry = Dns.GetHostByName("www.contoso.com")
IPHostEntry hostInfo = Dns.GetHostByName("www.contoso.com");
IPHostEntry^ hostInfo = Dns::GetHostByName( "www.contoso.com" );
IPHostEntry hostInfo = Dns.GetHostByName("www.contoso.com");
System.Object
System.Net.Dns
Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.
.NET Framework
Supported in: 2.0, 1.1, 1.0
.NET Compact Framework
Supported in: 2.0, 1.0