WPF的Datagrid数据是动态加载的，并后台一直再更新，保证只显示最新25条数据，更新正常，停止后滚动滚动条，每行数据就变成一样的了。我有调试，后台数据是对的。

At the moment my mind is elsewhere, so some of the details arent fresh in my mind! So I apologise. I am comparing two datasets. One is Authoritative and will override the data in the other. At present ...