How to read rtfd data in .Net

i have one .plist file containing some RTFD data in form of Base64 encoded string. I want to read that RTFD data in the .net application. In .Net i can convert base64 to byte array easily. But, don't know how to extract files from RTFD data byte array. If i save the byte array to some file on disk and then open it in notepad, then i can see rtf data along with attached image binary stored in i开发者_StackOverflow中文版t. My problem is i didn't found any RTFD file format or specification to read its binary structure in windows.

I need to know, Is there any RTFD file structure specification available? OR Any other way to read RTFD directly in .net.

Thanks,