public Guid AddUser(string userName)
{
lock (syncRoot)
{
if (ActiveUsers.Count(entry => entry.Value.Item1 == userName) == 0)
{
Guid guid = Guid.NewGuid();
ActiveUsers.Add(guid, new Tuple <string, DateTime>(userName, DateTime.Now));
return(guid);
}
else
{
ActiveUsers.RefreshUser(userName);
return(ActiveUsers.Where(entry => entry.Value.Item1 == userName).First().Key);
}
}
}
