check box selection event in datagridview

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C#

note it is windows application.


Design in datagridview as follows;

Date          1             2           3            4
1/2/2013   check box   check box  check box   check box

in run mode in the form load automatically all check box is checked .

select        Date          1             2         3            4 (Column Name)
check box   1/2/2013   check box   check box  check box   check box.

for the 1/2/2013, i unchecked the 2 and 3 check box and 1 and 4 check box is checked.
in database 1 and 4 session will save.

suppose for that 1/2/2013 no session means when i select any one of the check box from 1 to 4, then select check box to be unchecked.

How can i do using csharp.