<PackageReference Include="System.Security.Permissions" Version="10.0.0-preview.6.25358.103" />

SmtpPermission

Controls access to Simple Mail Transport Protocol (SMTP) servers.
using System.Security; using System.Security.Permissions; namespace System.Net.Mail { public sealed class SmtpPermission : CodeAccessPermission, IUnrestrictedPermission { public SmtpAccess Access { get; } public SmtpPermission(bool unrestricted) { } public SmtpPermission(SmtpAccess access) { } public SmtpPermission(PermissionState state) { } public void AddPermission(SmtpAccess access) { } public override IPermission Copy() { return null; } public override void FromXml(SecurityElement securityElement) { } 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; } } }