public IReadOnlyList<Field> GetFields()

public 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);
  }
}

public void RemoveFieldTableSnippet(Geodatabase geodatabase)
{
  // Removing all fields from 'Parcels' table except following 
  // Tax_Code
  // Parcel_Address

  // The table to remove fields
  string tableName = "Parcels";

  TableDefinition tableDefinition = geodatabase.GetDefinition<TableDefinition>(tableName);
  IReadOnlyList<Field> fields = tableDefinition.GetFields();

  // Existing fields from 'Parcels' table
  Field taxCodeField = fields.First(f => f.Name.Equals("Tax_Code"));
  Field parcelAddressField = fields.First(f => f.Name.Equals("Parcel_Address"));

  FieldDescription taxFieldDescription = new FieldDescription(taxCodeField);
  FieldDescription parcelAddressFieldDescription = new FieldDescription(parcelAddressField);

  // Fields to retain in modified table
  List<FieldDescription> fieldsToBeRetained = new List<FieldDescription>()
  {
    taxFieldDescription, parcelAddressFieldDescription
  };

  // New description of the 'Parcels' table with the 'Tax_Code' and 'Parcel_Address' fields
  TableDescription modifiedTableDescription = new TableDescription(tableName, fieldsToBeRetained);

  SchemaBuilder schemaBuilder = new SchemaBuilder(geodatabase);

  // Remove all fields except the 'Tax_Code' and 'Parcel_Address' fields
  schemaBuilder.Modify(modifiedTableDescription);
  schemaBuilder.Build();
}