您可以建立并掷回较特定的新例外状况。
否则便会掷回例外状况。
如果专案是本机专案，则会引发例外状况。
如果没有任何视窗开启，就会掷回例外状况。
如果文件不是预览列印模式，会掷回例外状况。
If the document is not in print preview, an exception is thrown.
如果发生例外状况，资料流目前位置保持不变。
If an exception occurs, the current position of the stream is unchanged.
否则当您尝试使用建构函式时，会掷回例外状况。
If you do, an exception is thrown when you try to use the constructor.
如果该主索引键已存在，就会掷回这个例外状况。
使用无效的COM物件时便会掷回例外状况。
如果计数器不存在，设定这个属性会掷回例外状况。
If the counter does not exist, setting this property throws an exception.
无法从密码存放区撷取密码时，所掷回的例外状况。
The exception that is thrown when a password cannot be retrieved from the password store.
所有使用执行阶段的语言都以类似方式处理例外状况。
All languages that use the runtime handle exceptions in a similar manner.
使用描述例外状况的讯息，初始化此类别的新执行个体。
Initializes a new instance of the class with a message that describes the exception.
拦截及处理由于其他执行绪所做变更而产生的例外状况。
Catch and handle the exceptions that result from changes made by other threads.
描述提供应用程序掷回的例外状况之相关资讯的效能计数器。
Describes the performance counters that provide information about the exceptions thrown by an application.
例如，XAML档案可能包括内含例外状况的自订控制项。
For example, a XAML file might contain a custom control that contains an exception.
如果您使用此方法时，文件已经受到保护，就会掷回例外状况。
If the document is already protected when you use this method, an exception is thrown.
有三种例外的状况，您必须对其单独处理
There are three exceptional situations, which you must handle separately
有三种例外的状况，您必须对其单独处理
There are three exceptional situations, which you must handle separately
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