DataTable internal index is corrupted

Question

I am working with a .NET WinForms app in C#, running against the 3.5 .NET framework. In this app, I am setting the .Expression member of a DataColumn in a

Answer 1

My understanding, from long and painful haggling over this problem, is that it's an artifact of non-thread-safe write operations, which usually you didn't know you were making.

In my case, the culprit seemed to be the BindingSource. I found that I needed to suspend binding, perform whatever operation I was trying, and then resume binding when I was done, and the problem went away. This was 18 months ago, so I'm not clear on the details anymore, but I remember getting the impression that the BindingSource is doing some kind of operation on its own thread. (This makes less sense to me now than it did at the time.)

Another potential source of trouble is the DataTable's RowChanging event. If you do something that modifies the table in that event handler, expect bad things.