WPF的TreeView执行ExpandSubtree时抛出异常System.NullReferenceException
最近拿到一个dump，有应用崩溃，通过查看dump，异常信息如下：0:012>!peExceptionobject:0000000005187278Exceptiontype: System.NullReferenceExceptionMessage: Objectreferencenotsettoaninstanceofanobject.InnerException: S