Hoe to get selected Checkbox row value from DataGridView into collection using c# ?

foreach (DataGridViewRow getRowItems in GridName.Rows)
{
DataGridViewCheckBoxCell chkBox = (DataGridViewCheckBoxCell)(getRowItems.Cells["checkboxColumn"]);
     if (chkBox.Value == chkBox.TrueValue)
     {
        //Your Logic
     }
}