protected void ClearControl(Control Ctrl)//passing the control
    {
        foreach (Control eachCtrl in Ctrl.Controls)//loop taking each controls
        {
            if (eachCtrl.Controls.Count > 0)
                ClearControl(eachCtrl);
            else if (eachCtrl is TextBox)
                ((TextBox)eachCtrl).Text = null;
        }
    }