上面这个不匹配的捕获也存在类似问题：它捕获了所有错误，但仅仅只报告了“打开文件时出现错误(errorin opening)”。
The mismatched catch above is similar: it catches all errors, but it reports only that there was an error in "opening." it's better to write this.
当尝试打开“打开文件”对话框中的某个文件，或右击解决方案资源管理器中的某个文件来打开它时，出现此错误。
This error arises when you have attempted to open a file in the Open File dialog box or by right-clicking a file in Solution Explorer.
当尝试打开“打开文件”对话框中的某个文件，或右击解决方案资源管理器中的某个文件来打开它时，出现此错误。
This error arises when you have attempted to open a file in the Open File dialog box or by right-clicking a file in Solution Explorer.
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