We have an NTreeList in a WinForms application. We have the AllowColumnReorder property set to true and are allowing users to change the order of the columns. I have two questions regarding this.

(1) After a column reorder, I can see that the NTreeList.Columns objects are rearranged (examined through the IDE's watch list), and they have new Index values. However, I am programatically reading and setting values using the old index values. Why does this continue to work when I have rearranged the columns?

(2) I need to persist the column order and load it back into the NTreeList the next time the application starts. The SaveToXml()/LoadFromXml() methods only save/restore the node data & original column configuration, not the new column orders. How would I get this to work? If I could successfully persist and restore the column orders, would I have to programmatically reference the columns by their column names instead of by their original index values?

I'm just a little confused because I can't find any data in the NTreeList object that describes how the columns are reordered (except the Index values), and when I do reorder them it doesn't make sense why current logic that accesses columns by index values continues to function. Any code, direction or documentation would be greatly appreciated. Thank you!

Lars