public void Init()
{
var rand = new System.Random();
achievementID = rand.Next();
while (AchievementTool.isContain(achievementID))
{
achievementID = rand.Next();
if (AchievementTool.isContain(achievementID))
{
break;
}
}
AchievementTool.WriteAchievementIdentifierRecord(achievementID);
}