Array.Copy(AddressToBytes(remoteEP.Address.Address), 0, connect, 4, 4);

Gives me the error:

'System.Net.IpAddress' is Obsolete: 'IPAddress.Address is Address Family Dependent, use Equals method for comparison.'

Thanks

Well you silly!  Just use the GetAddressBytes method of the IPAddress class.  Then you have a byte array that you can use in the constructor.