How to export data from AX2012 to .net DataTable

Hi All,

My requirement is to select some data from AX2012, then save those data to other database.

So I want to know how to select data into my .net program's DataTable? 

I have try to use the inbound ports to call a method on AX2012 to get the select result(The select result is a custom temporary table, when I call the method, it will fill the temporary table first.),

But the inbound ports does not return something like DataSet, I have on other ideas about this,

Any one can give me an  solution idea or reference for my requirement?