<PackageReference Include="NETStandard.Library" Version="2.0.0" />

System.Net.Sockets.SocketFlags

public enum SocketFlags
namespace System.Net.Sockets { public enum SocketFlags { Broadcast = 1024, ControlDataTruncated = 512, DontRoute = 4, Multicast = 2048, None = 0, OutOfBand = 1, Partial = 32768, Peek = 2, Truncated = 256 } }