BlockSource Method

UdpAnySourceMulticastClient.BlockSource Method

[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]

Blocks a source so that multicast packets originating from it are no longer received.

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

public void BlockSource(
	IPAddress sourceAddress


Type: System.Net.IPAddress
The address of the source to block.


The multicast group has not yet been joined.


The UdpAnySourceMulticastClient has been disposed.


An error occurred when attempting to access the socket. See the Remarks section for more information.

The BlockSource method blocks multicast packets originating from a specified source address from being received. The client must have completed a join to the multicast group.

The sourceAddress parameter may be either an IPv6 or IPv4 address, but the sourceAddress parameter must match the address family of the multicast group that the client joined.

If there is a socket failure while performing the block source operation, a SocketException is thrown. The error received is specified as a member of the System.Net.Sockets.SocketError enumeration.

Windows Phone OS

Supported in: 8.1, 8.0, 7.1

Windows Phone

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