23.2 The System.Exception class

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本文介绍了System.Exception类作为所有异常的基础类型，包含Message属性用于存放异常原因的描述，以及InnerException属性来链接导致当前异常的原因。

The System.Exception class is the base type of all exceptions. This class
has a few notable properties
that all exceptions share:
? Message is a read-only property of type string that contains a
human-readable description of the
reason for the exception.
? InnerException is a read-only property of type Exception. If its value is
non-null, it refers to the
exception that caused the current exception. (That is, the current
exception was raised in a catch block
handling the type InnerException.) Otherwise, its value is null, indicating
that this exception was not
caused by another exception. (The number of exception objects chained
together in this manner can be
arbitrary.)
The value of these properties can be specified in calls to the instance
constructor for System.Exception.