ATMLCommonLibrary.forms.ATMLNavigationWindow.AddNode C# (CSharp) Method

        private void AddNode( FileInfo fi )
        {
            string extension = fi.Extension;
            var node = new TreeNode( fi.Name );
            TreeNode parentNode = testSetNavigationTree.SelectedNode;
            node.Name = fi.Name;
            node.Tag = fi;
            SetTreeNodeImage( extension, node, parentNode );
            if (parentNode != null)
                parentNode.Nodes.Add( node );
            else
                testSetNavigationTree.Nodes.Add( node );
        }