UdpClient Constructor (AddressFamily)

Initializes a new instance of the UdpClient class.

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

public UdpClient (
	AddressFamily family
public UdpClient (
	AddressFamily family
public function UdpClient (
	family : AddressFamily



One of the AddressFamily values that specifies the addressing scheme of the socket.

Exception typeCondition


family is not InterNetwork or InterNetworkV6.


An error occurred when accessing the socket. See the Remarks section for more information.

The family parameter determines whether the listener uses an IP version 4 address (IPv4) or an IP version 6 (IPv6) address. To use an IPv4 address, pass the InterNetwork value. To use an IPv6 address, pass the InterNetworkV6 value. Passing any other value will cause the method to throw an ArgumentException.


If you receive a SocketException, use SocketException.ErrorCode to obtain the specific error code. Once you have obtained this code, you can refer to the Windows Sockets version 2 API error code documentation in MSDN for a detailed description of the error.

The System.Net.Sockets.UdpClient(AddressFamily) is not suitable for joining a multicast group because it does not perform socket binding.

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

.NET Compact Framework

Supported in: 2.0