如前，图中的数字指示事件的顺序。
As in the previous diagram the Numbers indicate the order of the events.
指示事件完成之前已执行的分支指令的个数。
Indicates the number of branch instructions executed until the event is completed.
在衍生类别中覆写时，取得指示事件委派是否为多点传送委派的值。
When overridden in a derived class, gets a value indicating whether the event delegate is a multicast delegate.
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