System.Security.PermissionSet.FromXml C# (CSharp) Method

        public virtual void FromXml(SecurityElement et) { }
        public IEnumerator GetEnumerator() { return Array.Empty<object>().GetEnumerator(); }

 private PermissionSet ParsePermissionSet(Parser parser)
 {
     SecurityElement topElement = parser.GetTopElement();
     PermissionSet set = new PermissionSet(PermissionState.None);
     set.FromXml(topElement);
     return set;
 }