如需处理常式对应的详细资讯，请参阅 技术提示 3。
For more information about handle maps, see Technical Note 3.
当保护区块的程序码出现例外状况时，会按顺序搜寻对应的处理常式，并执行第一个符合筛选器条件。
When an exception is raised by code in a protected block, the set of corresponding handlers is searched in order, and the first one with a matching filter condition is executed.
NET基础结构因此可以在接收对应要求时执行个体化并呼叫处理常式。
NET infrastructure will then instantiate and call the handler when the corresponding request is received.
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