public void UpdateActivity(string user)
{
Chatter activity = currentUsers.FirstOrDefault(u => u.Name == user);
if (activity != null)
{
activity.LastActivity = DateTime.Now;
}
}
public void Add(string user)
{
if (currentUsers.All(u => u.Name != user))
{
Chatter activity = new Chatter {
Name = user
};
currentUsers.Add(activity);
}
}
public void Remove(string user)
{
Chatter activity = currentUsers.FirstOrDefault(u => u.Name == user);
currentUsers.Remove(activity);
}