首先，要向窗體添加一個TreeView控件（廢話）；

然后再添加一個ContextMenuStrip控件；

接下就要給TreeView添加一個MouseDown事件，代碼如下：

PRivate void treeView1_MouseDown(object sender, MouseEventArgs e)
        ...{
            if (e.Button == MouseButtons.Right)//判斷你點的是不是右鍵
            ...{
                Point ClickPoint = new Point(e.X, e.Y);
                TreeNode CurrentNode = treeView1.GetNodeAt(ClickPoint);
                if (CurrentNode != null)//判斷你點的是不是一個節點
                ...{
                    switch (CurrentNode.Name)//根據不同節點顯示不同的右鍵菜單，當然你可以讓它顯示一樣的菜單
                    ...{
                        case "errorUrl":
                            CurrentNode.ContextMenuStrip = contextMenuStripErrorUrl;
                            break;
                    }
                    treeView1.SelectedNode = CurrentNode;//選中這個節點
                }
            }
        }