[C#] 關閉 子窗口 並顯示 父窗口

父窗口給子窗口傳遞一個參數, 讓子窗口可以認到父窗口!

if (comboBox1.Text == "boiler1")
  {
  this.Enabled = false; //this指的是Form1
  boiler1 form=new boiler1(this);  
  form.Show();
  }


子窗體：
public partial class boiler1
{
   Form1 form1;
public boiler1(Form1 form1)
{
     InitializeComponent();
      this.form1 = form1;
}
private void boiler1_FormClosed(object sender, FormClosedEventArgs e)
  {
  form1.Enabled = true;
  }
}