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;
        }
    }
}