UdpClient.EnableBroadcast Property

Broadcasting is limited to a specific subnet. You can broadcast to your local subnet by sending a packet to 255.255.255.255; or, you can use the directed broadcast address, which is the network portion of an Internet Protocol (IP) address with all bits set in the host portion. For example, if your IP address is 192.168.1.40 (a Class C address, with the network portion as the first three octets, and the host portion is the last octet), your directed broadcast address is 192.168.1.255.

The following code example shows the use of the EnableBroadcast property.

public static void GetSetEnableBroadcast(UdpClient u)
{
    // Set the Broadcast flag for this client.
    u.EnableBroadcast = true;
    Console.WriteLine("EnableBroadcast value is {0}",
        u.EnableBroadcast);
}

.NET Framework

.NET Framework Client Profile

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference