public void ShowAllFields()

var tv = TableView.Active;
if (tv == null)
  return;

// get list of hidden fields
var hiddenFields = tv.GetHiddenFields();


// show all fields
if (tv.CanShowAllFields)
  tv.ShowAllFields();



// hide only "CITY_FIPS", "STATE_FIPS"
if (tv.CanShowAllFields)
{
  // show all fields
  tv.ShowAllFields();
  tv.SetHiddenFields(new List<string> { "CITY_FIPS", "STATE_FIPS" });
}



// add "STATE_NAME to set of hidden fields
tv.SetHiddenFields(new List<string> { "STATE_NAME" });


// hide selected fields
if (tv.CanHideSelectedFields)
  tv.HideSelectedFields();