private void ViewModel_SessionStarted(object sender, SessionEventArgs e)
 {
     this.AddSession(e.Session);
 }
 protected void OnSessionStarted(SessionEventArgs e)
 {
     this.SessionStarted?.Invoke(this, e);
 }
 private void ViewModel_SessionEnded(object sender, SessionEventArgs e)
 {
     this.CloseSession(e.Session);
 }
        protected void OnSessionStarted(Session session)
        {
            SessionEventArgs e = new SessionEventArgs();

            e.Session = session;

            this.OnSessionStarted(e);
        }