Adding own event handler in front of other event handlers?

The order of execution of handlers of a single event cannot be controlled through the basic behavior of a built-in event itself. MulticastDelegates are "bags" of handlers, and they just grab them one at a time. Keep in mind that this is how most developers expect this to work, and it can be dangerous to allow order-dependent event handlers.

Event handlers should normally not know about each other, because if they are dependent on being executed before or after another handler, they first have to know of the existence of the other handler (violating information hiding and several other design principles), and second, if that order changes, the behavior will be broken.

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