Enum SocketOptionLevel Path C++ Link System.Net.Sockets.SocketOptionLevel, System underlying int32 System.dll Values 5 NameValueHex Socket655350xFFFFIP00x00IPv6410x29Tcp60x06Udp170x11 Used by 1types with a member, parameter or interface of this type Socket // System.Net.Sockets.SocketOptionLevel, System enum class SocketOptionLevel : int32 { Socket = 65535, IP = 0, IPv6 = 41, Tcp = 6, Udp = 17, };