I have a certain requirement that, if the first checkbox in a row of checkboxes is unchecked, then all the other checkboxes must be unchecked.
Here is a sample

secondly, declare a CheckBox array in the class and, in the Load() method, initialize all checkboxes to created CheckBox array:

finally, in the CheckedChanged() method, write code which will check or uncheck all checkboxes, depending on the first checkbox.

