public void SetNodePainter(TreeNode node, Color backColor, Color foreColor) { if (view.IsNull()) { return; } if (view.Painter.ContainsKey(node)) { view.Painter[node].BackColor = backColor; view.Painter[node].ForeColor = foreColor; } else { view.Painter.TryAdd(node, new UITreeNodePainter() { BackColor = backColor, ForeColor = foreColor }); } view.Invalidate(); }