Doc to PDF conversion with Syncfusion dll changes font color

I got the solution in an answer to the same question in the English Stack overflow. The problem was really the configuration of the word document, because the headers were set with the color of the letter Automatic, by default, and when converting they were black, while opening in Word, rendered and, as a Heading, put the letter to white on dark background. So, just put in word the letter color of the headers as White rather than Auto and the conversion is already working.