Document info becomes gibberish

[nzdvis]

Hello,

Setting the document title, subject and author is not translating right.

PdfDocument document = new PdfDocument(); 

string data = "English, Ελληνικά, 漢語";
document.Info.Title = data; 
document.Info.Subject = data;
document.Info.Author = data;

Becomes this:

I have tried with "normal" data, this text with justed used in the test, so I tried.

Thanks