How to loop through CheckBoxes in DataGridView in Windows Forms Application

my datagrid like

name          status

 abc           chkbox1(checked)

 xyz          chkbox2(unchecked)

i want do some task if chkbox1 is checked

i want do some task if  chkbox2 is unchecked

how to loop the datagrid and how to find the checkbox in datagrid is checked or not

Please