How to add a row in last of the gridview.And how to fetch a specific row from gridview(in c#)

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C#

1) How to add a row in last of the gridview i.e When i will add it will synchronisely after previous,aftr that..

2) I have butoons like first,prv(previous),next,last.When i will click first first row of the grid ,when next click next will select and prv ....so on.


Plz help
Thank in advance....