How to select the first child node of a treeview.

[Guest]

I've tried the following, but keep getting the error "Object reference not
set to an instance of the object."

TreeNode node = tvHistory.Nodes[0].FirstNode;
tvHistory.SelectedNode = node;

I've also tried:
tvHistory.SelectedNode = tvHistory.Nodes[0].FirstNode;

Any suggestions?

 

[Guest]

I found the solution.

I had to put tvHistory.Select() just prior to activate the treeview.
So it now looks like:
sHistory.Select();
sHistory.SelectedNode = sHistory.Nodes[0].Nodes[0];