Unblocks a source that was previously blocked by a call to the BlockSource method so that multicast packets originating from it can be received.
Assembly: System.Net (in System.Net.dll)
The method unblocks multicast packets originating from a specified source address so they can be received. The specified source address must have previously been blocked by a call to the BlockSource method.
The client must have completed a join to the multicast group.
The sourceAddress parameter may be either an IPv6 or IPv4 multicast address.
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