<PackageReference Include="System.Security.Permissions" Version="10.0.0-preview.4.25258.110" />

FileIOPermissionAttribute

Allows security actions for FileIOPermission to be applied to code using declarative security. This class cannot be inherited.
namespace System.Security.Permissions { [AttributeUsage(AttributeTargets.Assembly | AttributeTargets.Class | AttributeTargets.Struct | AttributeTargets.Constructor | AttributeTargets.Method, AllowMultiple = true, Inherited = false)] public sealed class FileIOPermissionAttribute : CodeAccessSecurityAttribute { public string Read { get; set; } public string Write { get; set; } public string Append { get; set; } public string PathDiscovery { get; set; } public string ViewAccessControl { get; set; } public string ChangeAccessControl { get; set; } [System.Obsolete] public string All { get; set; } public string ViewAndModify { get; set; } public FileIOPermissionAccess AllFiles { get; set; } public FileIOPermissionAccess AllLocalFiles { get; set; } public FileIOPermissionAttribute(SecurityAction action) : base(action) { } public override IPermission CreatePermission() { return null; } } }