ImapClient.readstreamdata C# (CSharp) Method

    List<string> readstreamdata(string tagstr)
    {
        int b;
        bool stop = false;
        List<string> lines = new List<string>();
        StringBuilder currentLine = new StringBuilder();
        while (!stop)
        {
            b = stream.ReadByte();
            if (b == 10)
            {
                currentLine.Append(Convert.ToChar(b));
                lines.Add(currentLine.ToString());
                string line = currentLine.ToString();
                currentLine.Clear();
                if (line.StartsWith(tagstr))
                {
                    return lines;
                }
            }
            else
            {
                currentLine.Append(Convert.ToChar(b));
            }
        }
        return lines;
    }