using (StreamReader reader = new StreamReader(filename, Encoding.UTF8, true))
        {
            bool canBreak = false;
            token.Register(() => canBreak = true);

            string rowasis = await reader.ReadLineAsync();

            while ((rowasis = await reader.ReadLineAsync()) != null)
            {
                if (canBreak == true)
                {
                    token.ThrowIfCancellationRequested();
                }

                string[] row = rowasis.Split(';');

                Debug.WriteLine(string.Format("{0}", row));
            }
        }