private void UpdateParentDeal(bool add)
{
DealsHandler handler
= new DealsHandler(add ? Node.Parent as CustomNode : Node.Parent.Parent as CustomNode);
handler.UpdateDealsCost();
handler.UpdateTextOfNode();
}
private void addDealBtn_Click(object sender, EventArgs e)
{
DealsHandler handler = new DealsHandler(treeView);
handler.Add();
}