<PackageReference Include="NETStandard.Library" Version="2.0.1" />

System.Reflection.PropertyAttributes

public enum PropertyAttributes
namespace System.Reflection { public enum PropertyAttributes { HasDefault = 4096, None = 0, Reserved2 = 8192, Reserved3 = 16384, Reserved4 = 32768, ReservedMask = 62464, RTSpecialName = 1024, SpecialName = 512 } }