How to find out DNS values

Question

Hello everybody, I am new here. Not quite familiar with this place.
I wrote a small program for my job today. This program is for domains, read out all of there DNS values. For example, domain like "abc.com"
We can get www.abc.com's values like ip xxx.xxx.xxx.xxx. My program can read some common values such as pop, smtp etc using namespace System.NET.
As everybody know, domains have many different DNS values, just like cname, mail exchanger, SPF records etc.
My problem is how to read these values out. Plz help me out.Thank you very much.