Ext.Net.TreePanelBase.AddChildes C# (CSharp) Method

        private void AddChildes(TreeNode parent, StringBuilder sb)
        {
            string cfg = new ClientConfig().Serialize(parent);

            if (parent.Nodes.Count > 0)
            {
                bool addComma = cfg.Length > 2;
                int index = cfg.LastIndexOf("}");
                sb.Append(cfg.Substring(0, index));

                sb.Append(addComma ? ",":"").Append("children:[");

                foreach (TreeNodeBase node in parent.Nodes)
                {
                    node.Owner = this;
                    
                    if (node is TreeNode)
                    {
                        TreeNode treeNode = (TreeNode) node;
                        this.AddChildes(treeNode, sb);
                    }
                    else
                    {
                        sb.Append(new ClientConfig().Serialize(node));
                    }

                    sb.Append(",");
                }

                if (sb[sb.Length - 1] == ',')
                {
                    sb.Remove(sb.Length - 1, 1);
                }
                sb.Append("");
                sb.Append("]}");
            }
            else
            {
                sb.Append(cfg);
            }
        }