Clear Control using panel

NOTE : you have just take all controls in panel.
Call this method in clear button event. pass that panel in method argument

public void Control(System.Windows.Forms.Panel Pan)

{

    foreach (System.Windows.Forms.Control ctl in Pan.Controls)

    {

        if (ctl.GetType().ToString().Contains("TextBox"))

        {

            ((System.Windows.Forms.TextBox)ctl).Clear();

        }

        if (ctl.GetType().ToString().Contains("ComboBox"))

        {

            ((System.Windows.Forms.ComboBox)ctl).SelectedIndex = -1;

        }

    }

}