delete whole row of gridview

how can i delete the whole rows of gridview using code behind c sharp like

+-----+-----+------+
|Col1 | Col2| Col3 |
|     |     |      |
| a   |  1  |   5  |
|     |     |      |
| a   |  2  |   6  |
|     |     |      |
| a   |  3  |   7  |
|     |     |      |
| a   |  4  |   8  |
+-----+-----+------+

and I want to delete the whole rows in the gridview so that it becomes

+-----+-----+------+
|Col1 | Col2| Col3 |
|     |     |      |
| a   |  4  |   8  |
+-----+-----+------+

only last duplicate row left and all the rest is deleted (rows are deleted from all the colu开发者_运维百科mns of gridview)

Anyone knows how to achieve this?

Have a look at GridView.DeleteRow(). MSDN documentation is here: GridView.DeleteRow Method