Difference between dataset and array

DataSet is good feature of .net, But while we need to working with large amount of data then it is not working.

I remember that once in my project I need to compare single column value from text file. Then i used DataSet, but row is more then 90,00,000 so it is failed there.

So i used normal array. It is working so fine. Normal Array can hold more then 10,000,000 value.

It is very easy to compare with array because we can use binary search.