How to populate tree nodes from server side? I am trying to convert nodes ToJson but method seems not working.
Code:TreeNodeCollection nodes = new TreeNodeCollection();
TreeNode root = new TreeNode("-1", "Root");
nodes.Add(root);
TreeNode node1 = new TreeNode("1001", "Name1");
root.ChildNodes.Add(node1);
string n = nodes.ToJson(); --> ToJson method not found
ResMgrCustomer.AddScript("TreePnlLevel.initChildren(" + n + ")");
