how checkbox selected all months save table one parameter in c# window
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| ID | Fee Name | Payment Amount | Months |
| 1 | Exam | 500 | January |
| 2 | Exam | 500 | February |
| 3 | Exam | 500 | March |
| 4 | Exam | 500 | April |
| 5 | Exam | 500 | May |
| 6 | Exam | 500 | June |
| 7 | Exam | 500 | July |
| 8 | Exam | 500 | August |
| 9 | Exam | 500 | September |
| 10 | Exam | 500 | October |
| 11 | Exam | 500 | November |
| 12 | Exam | 500 | December |