<PackageReference Include="System.Security.Permissions" Version="10.0.0-preview.2.25163.2" />

WebBrowserPermissionAttribute

Allows security actions for WebBrowserPermission to be applied to code using declarative security.
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 WebBrowserPermissionAttribute : CodeAccessSecurityAttribute { public WebBrowserPermissionLevel Level { get { return WebBrowserPermissionLevel.Unrestricted; } set { } } public WebBrowserPermissionAttribute(SecurityAction action) : base(action) { } public override IPermission CreatePermission() { return new WebBrowserPermission(); } } }