var prefs = Application.Context.GetSharedPreferences(Application.PackageName, FileCreationMode.Private);
IDPatient = prefs.GetInt("idPatient", -1);
IDFamily = prefs.GetInt("idFamily", -1);
IDAvatarPatient = prefs.GetInt("idAvatarPatient", -1);
IDAvatarFamily = prefs.GetInt("idAvatarFamily", -1);
string username = prefs.GetString("CandSUserName", "-1");
string password = prefs.GetString("CandSPassword", "-1");