ZoneAdd zone = new ZoneAdd();
//zone.Controls.Clear();
//TreeView tree = new TreeView();
//zone.Controls.Add(tree);
//ContextMenuStrip menuStrip = new ContextMenuStrip();
//menuStrip.TopLevel = false;
//menuStrip.Text = "商品类型的快捷设置";
//ToolStripItem add;
// add = new System.Windows.Forms.ToolStripMenuItem();
//ToolStripItem delete=;
//add.Text = "添加"; delete.Text = "删除";
//menuStrip.Items.AddRange(new System.Windows.Forms.ToolStripItem[] {
//add,delete
//});
//tree.Controls.Add(menuStrip);
//tree.ContextMenuStrip = menuStrip;