Helper functions for storing data in session.

ISessionExtensions.cs

        public static void SetInt64(this ISession session, string key, long lng)
        {
            var bytes = BitConverter.GetBytes(lng);
            session.Set(key, bytes);
        }

        public static long GetInt64(this ISession session, string key, long defaultIfNull)
        {
            var bytes = session.Get(key);
            if (bytes == null || bytes.Length == 0)
            {
                return defaultIfNull;
            }
            return BitConverter.ToInt64(bytes, 0);
        }

        public static void SetDateTime(this ISession session, string key, DateTime dt)
        {
            SetInt64(session, key, dt.ToBinary());
        }

        public static DateTime GetDateTime(this ISession session, string key, DateTime defaultIfNull)
        {
            var binTime = GetInt64(session, key, defaultIfNull.ToBinary());
            return DateTime.FromBinary(binTime);
        }