Correct usage of Action and Events
c#, events
Solution
A delegate can be a delegate to more than one function. If you have a delegate `alpha` that delegates to `Alpha()` and a delegate `beta` that delegates to `Beta()` then `gamma = alpha + beta;` is a delegate that calls `Alpha()` then `Beta()`. `gamma - beta` produces a delegate that calls `Alpha()`. It's a bit of a weird feature, to be perfectly frank.
The code you've posted is bizarre. It says "go through the list of functions in action, produce a whole pile of delegates that invoke fewer and fewer functions, and then finally assign a delegate that does nothing to `action`. Why on earth would anyone do this? Just assign `null` to `action` and be done with it.
Problem
I am a bit new to `c#` so please overlook if you find it trivial. I saw the following "weird" code. Can anybody shed a bit of light on it. ``` public event Action _action; if (_action != null) { foreach (Action c in _action.GetInvocationList()) { _action -= c; } } ``` Specially the `_action -= c;` part.