VS 2010 Best way to put a contents of a dataset into a tab delimited file?

I have a program that queries multiple data sources, firing the results of each query into a single dataset.

That part is working okay - I'm just now sure how best to proceed.

I need to export this dataset to a fixed length, tab delimited file. Should I loop through the data set and write lines to a text file (in which case I could use a sample), or is there a better way ?

Thanks.