google play service error after importing google play service. its saying namespace cant contains member directly such as fields

namespace demo {

  public static class 24698115432{
  public const string achievement_incremental_achievement = "CgkIj_HliZgHEAIQAg"; // <GPGSID>
  public const string leaderboard_leader_board = "CgkIj_HliZgHEAIQAw"; // <GPGSID>
  public const string achievement_test_achivement = "CgkIj_HliZgHEAIQAQ"; // <GPGSID>

} }