public User[] GetUsers(string[] userNames) 

{ 

  var userList = new List<User>(); 

​

  foreach (var userName in userNames) 

  { 

      var sql = "SELECT * FROM Users WHERE Id = '" + userNames+ "'"; 

      var user = _database.QueryAsync(sql); 

      userList.Add(user); 

  } 

​

  return userList; 

}