Hi mahesh

Try this code once. This code will return all the domain names assign for top node.

        public void GetDomains()
        {
            try
            {
                Node parent = new Node(-1);
                foreach (Node child in parent.Children)
                {
                    Domain[] domains = library.GetCurrentDomains(child.Id);
                    if (domains != null && domains.Length >= 0)
                    {
                        foreach (Domain d in domains)
                        {
                            Response.Write(d.Name.ToString() + ";");
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message.ToString());
            }
        }

Hope this will help you.

Pnima