c# 容器控制元件panel皮膚

private void button1_Click(object sender, EventArgs e)
        {
            //判斷文字框是否有值
            if (textBox2.Text == "")
            {
                MessageBox.Show("文字框無值，不能顯示panel控制元件");
                //文字框無值，把焦點放到文字框上
                textBox2.Focus();
            }
            else
            {
                if (textBox2.Text == "顯示panel")
                {
                    panel1.Visible = true;//顯示panel,panel中包含另一個文字框textbox1
                }
                else
                {
                    MessageBox.Show("文字框有值，但卻不能顯示panel控制元件");
                }
            }

        }

        private void Form1_Load(object sender, EventArgs e)
        {
            //窗體初始化載入禁用panel皮膚容器控制元件
            panel1.Visible = false;
            //設定皮膚控制元件panel的邊框
            panel1.BorderStyle. = BorderStyle.Fixed3D;//邊框樣式
            textBox1.Text = "姓名";
        }