Networking System [00 00 00 00 00 00 00 00 04 00 00 00 00 00 00 00 ] 1.0.x.x 1.0.5000.0 2.0.0.0 4.0.0.0 System.Enum The enumeration defines the socket option levels that can be passed to the and methods. enumerated values are grouped by . Note   To use on Windows XP, install Advance Networking Pack for Windows XP. Defines socket option levels for the and methods. Field 1.0.5000.0 2.0.0.0 4.0.0.0 System.Net.Sockets.SocketOptionLevel IP options apply only to IP sockets. 0 Field 1.0.5000.0 2.0.0.0 4.0.0.0 System.Net.Sockets.SocketOptionLevel IPv6 To be added. options apply only to IPv6 sockets. Field 1.0.5000.0 2.0.0.0 4.0.0.0 System.Net.Sockets.SocketOptionLevel Socket options apply to all sockets. 0 Field 1.0.5000.0 2.0.0.0 4.0.0.0 System.Net.Sockets.SocketOptionLevel Tcp options apply only to TCP sockets. 0 Field 1.0.5000.0 2.0.0.0 4.0.0.0 System.Net.Sockets.SocketOptionLevel Udp options apply only to UDP sockets. 0 0