Clear controls

 private void ClearControls()
         {
             foreach (Control container in Parent.Controls)
             {
                 foreach (Control ctrl in container.Controls)
                 {
                     if (ctrl is TextBox)
                     {
                         ((TextBox)ctrl).Text = string.Empty;
                     }
                     if (ctrl is CheckBoxList)
                     {
                         ((CheckBoxList)ctrl).ClearSelection();
                     }
                     if (ctrl is RadioButton)
                     {
                         ((RadioButton)ctrl).Checked = false;
                     }
                 }
             }
         }