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What's better: DataSet or DataReader?

I simply saw this topic: data table vs dataset however it failed to clear up my doubt .. Let me give an explanation for higher, I was doing reference to database and wished to reveal the consequences in a grid view. (I used record set when I worked with VB6 while ago and dataset is quite much like it so was an awful lot less complicated to apply dataset.)Then a man advised me dataset wasn't the exceptional method to do.