I keep getting a crash in ListFiller:Fill

I keep getting random crashed in the Fill function in ListFiller.cs. I get the Collection was modified; enumeration operation may not execute error on IEnumerable source in the foreach (var sourceItem in staticSource) line.

I have had other similar problems within the rest of the library, where because I update datasets quite often, obviously before the last has been written to screen, the array has been updated before it has finished iterating through it! Normally, casting ToArray() // ToList() has solved this.

Is this problem solved when you use ToArray/ToList in your application?
I would like to avoid adding this to OxyPlot, as I guess there may be a performance hit for large datasets.

Can we lock the collection's syncroot while updating the plot?

It has been solved where I've used it in other places, but obviously can't here.
I'll have a look at syncroot, thanks.

The way I seem to have solved this was my using a ConcurrentQueue instead of a List as my ItemsSource. ConcurrentQueue's are thread safe and so have avoided the issue where the ItemsSource was getting updated whilst that function was looping. I think if I had implemented the same thing throughout my application then maybe I wouldn't have needed to do any ToArray's. Hopefully if I have time i'll go back and undo all of that - as you say, large datasets maybe hit and I do have HUGE datasets. Maybe something to look at in your tutorials? ConcurrentQueue's are no harder to implement than lists but are thread safe :-)