IRC command RFC parser

gistfile1.cs

            using (var reader = new StreamReader("rfc.txt"))
            using (var writer = new StreamWriter("rfc.parsed"))
            {
                string pad = "        ";
                string line;
                var builder = new StringBuilder(10240);
                string cmd = string.Empty;
                while ((line = reader.ReadLine()) != null)
                {
                    if (line.Length > 0 && line[0] != ' ')
                    {
                        builder.AppendLine(pad + "/// </example>");
                        writer.Write(builder.ToString());
                        builder.Clear();
                        writer.WriteLine(pad + cmd + ",");
                        writer.WriteLine();
                        builder.AppendLine(pad + "/// <summary>");
                        continue;
                    }

                    int idx;
                    if ((idx = line.IndexOf("Command: ")) != -1)
                    {
                        idx += "Command: ".Length;
                        cmd = line.Substring(idx).Trim();
                    }

                    if (line.IndexOf("Examples:") != -1 || line.IndexOf("Example:") != -1)
                    {
                        builder.AppendLine(pad + "/// </summary>");
                        builder.AppendLine(pad + "/// <example>");
                        continue;
                    }

                    builder.AppendLine(pad + "/// " + SecurityElement.Escape(line.Length >= 3 ? line.Substring(3) : line));
                }
            }