namespace System.Security.Permissions { [Obsolete("Code Access Security is not supported or honored by the runtime.", DiagnosticId = "SYSLIB0003", UrlFormat = "https://aka.ms/dotnet-warnings/{0}")] [Flags] public enum FileIOPermissionAccess { AllAccess = 15, Append = 4, NoAccess = 0, PathDiscovery = 8, Read = 1, Write = 2 } }