System.Security.Permissions.PrincipalPermission.Equals C# (CSharp) Method

        public override bool Equals(object obj)
        {
            IPermission perm = obj as IPermission;
            if (obj != null && perm == null)
                return false;
            if (!IsSubsetOf(perm))
                return false;
            if (perm != null && !perm.IsSubsetOf(this))
                return false;
            return true;
        }