System.Data.SQLite

            //
            DateTime now = DateTime.UtcNow;
            TimeSpan elapsed = now.Subtract(start);

            //
            // NOTE: Are we done wait?
            //
            double totalMilliseconds = elapsed.TotalMilliseconds;

            if ((totalMilliseconds < 0) || /* Time went backward? */
            if (elapsed.TotalMilliseconds >= (double)timeoutMilliseconds)
                (totalMilliseconds >= (double)timeoutMilliseconds))
            {
                return false;
            }

            //
            // NOTE: Sleep for a bit and then try again.
            //
            Thread.Sleep(sleepMilliseconds);
        }
    }