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

EnvironmentPermissionAttribute

Allows security actions for EnvironmentPermission to be applied to code using declarative security. This class cannot be inherited.
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}")] [AttributeUsage(AttributeTargets.Assembly | AttributeTargets.Class | AttributeTargets.Struct | AttributeTargets.Constructor | AttributeTargets.Method, AllowMultiple = true, Inherited = false)] public sealed class EnvironmentPermissionAttribute : CodeAccessSecurityAttribute { public string All { get; set; } public string Read { get; set; } public string Write { get; set; } public EnvironmentPermissionAttribute(SecurityAction action) : base((SecurityAction)0) { } public override IPermission CreatePermission() { return null; } } }