<PackageReference Include="System.Security.Permissions" Version="10.0.0-preview.5.25277.114" />

UIPermission

Controls the permissions related to user interfaces and the Clipboard. This class cannot be inherited.
namespace System.Security.Permissions { public sealed class UIPermission : CodeAccessPermission, IUnrestrictedPermission { public UIPermissionClipboard Clipboard { get; set; } public UIPermissionWindow Window { get; set; } public UIPermission(PermissionState state) { } public UIPermission(UIPermissionClipboard clipboardFlag) { } public UIPermission(UIPermissionWindow windowFlag) { } public UIPermission(UIPermissionWindow windowFlag, UIPermissionClipboard clipboardFlag) { } public override IPermission Copy() { return this; } public override void FromXml(SecurityElement esd) { } public override IPermission Intersect(IPermission target) { return null; } public override bool IsSubsetOf(IPermission target) { return false; } public bool IsUnrestricted() { return false; } public override SecurityElement ToXml() { return null; } public override IPermission Union(IPermission target) { return null; } } }