如何在C#中清除面板控件中的TextBoxes、ComboBoxes、CheckBoxes等控件

// 清除面板控件中的TextBoxes、ComboBoxes、CheckBoxes等控件
foreach (Control control in panel1.Controls)
{
    if (control is TextBox)
    {
        TextBox textBox = (TextBox)control;
        textBox.Text = string.Empty;
    }
    else if (control is ComboBox)
    {
        ComboBox comboBox = (ComboBox)control;
        comboBox.SelectedIndex = -1;
    }
    else if (control is CheckBox)
    {
        CheckBox checkBox = (CheckBox)control;
        checkBox.Checked = false;
    }
}