How to “Unset” Event

Question

If I have a combobox click event set in the designer.cs page and then at some point during the running of the program, based on some condition, I no longer want the combobox

Answer 1

The reason you cannot use

comboboxname.Click = null

or

comboboxname.Click += null

is that the event Click actually contains a list of event handlers. There may be multiple subscribers to your event and to undo subscribing to an event you have to remove only your own event handler. As it has been pointed out here you use the -= operator to do that.