目录引言1.显示普通字符串:2.显示转义字符3.显示变量4.显示换行5.显示不换行6gDBSetFS.显示结果定向至文件7.原样输出字符串，不进行转义或取变量(用单引号)8.显示命令执行结果引言
I want to create an attached property of type ObservableCollection<Notification> and bind it to a property of the same type on the DataContext.
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