public SortDescription( 
   Field field
)

{
  //Must be called within QueuedTask.Run()
  RowCursor SortWorldCities(FeatureClass worldCitiesTable)
  {
    using (FeatureClassDefinition featureClassDefinition = worldCitiesTable.GetDefinition())
    {
      Field countryField = featureClassDefinition.GetFields()
        .First(x => x.Name.Equals("COUNTRY_NAME"));

      Field cityNameField = featureClassDefinition.GetFields()
        .First(x => x.Name.Equals("CITY_NAME"));

      // Create SortDescription for Country field
      SortDescription countrySortDescription = new SortDescription(countryField);
      countrySortDescription.CaseSensitivity = CaseSensitivity.Insensitive;
      countrySortDescription.SortOrder = SortOrder.Ascending;

      // Create SortDescription for City field
      SortDescription citySortDescription = new SortDescription(cityNameField);
      citySortDescription.CaseSensitivity = CaseSensitivity.Insensitive;
      citySortDescription.SortOrder = SortOrder.Ascending;

      // Create our TableSortDescription
      TableSortDescription tableSortDescription = new TableSortDescription(
        new List<SortDescription>() { countrySortDescription, citySortDescription });

      return worldCitiesTable.Sort(tableSortDescription);
    }
  }
}