private Dictionary <int, string> GetUsersFromAtt() { string name = "", password = ""; int enrollno = 0, privilage = 0; bool enabled = false; Dictionary <int, string> res = new Dictionary <int, string>(); if (_axCZKEM1.ReadAllUserID(_iMachineNumber)) { while (_axCZKEM1.GetAllUserInfo(_iMachineNumber, ref enrollno, ref name, ref password, ref privilage, ref enabled)) { if (!res.ContainsKey(enrollno)) { res[enrollno] = name; } } } return(res); }