c# - iText - how to do search/replace on existing RTF document -

Currently I'm working on simple mail-merge modules.

Change what I want * .tft template, then [[field]] tags, and finally - print them all.

I got the iText library which is capable of loading / saving PDFFF and RTF. I managed to load the RTF, merged some copies into a huge dock, but I have no idea to change [[field]] by custom data such as customer data / addresses.

Is this feature present, and if yes - how to do it?

Thanks: In advance

Edit: Solution Platform c # / .net

I do not think that PDF is the way you want to go.

According to this it is the most difficult

G-Men