How to get values from dynamic textboxes in grid view in windows application?

See more:

C#

In my windows application page, i have added one grid view .I need two rows with textboxes (with symbol $ __.__ in that textbox) to display after the page loading.If i enter some numeric value in 1st textbox and press enter it will add another dynamic row with textbox (with symbol $ __.__ in that textbox) before the last row .suppose if i enter some numeric value in that 2nd row textbox means, the value of first row and second row textboxes get added and the value will be display in last row textbox.continuosly adding rows before the last row and the values get added and the result will be display in last textbox.

How to do this dynamically using gridview in windows application? please give your valuable ideas or points...