Error "Collection was modified; enumeration operation may not execute" during crear points collection

Hello,

There is the next situation: when I clear points collection in model for graph, I catch next unhandled exception:

Collection was modified; enumeration operation may not execute.. System.InvalidOperationException: Collection was modified; enumeration operation may not execute.
   at System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource)
   at System.Collections.Generic.List`1.Enumerator.MoveNextRare()
   at System.Collections.Generic.List`1.Enumerator.MoveNext()
   at Mindscape.WpfElements.Charting.DataSeries.AnalyseSeries()
   at Mindscape.WpfElements.Charting.Chart.AnalyseAndRebuildAll()
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)

This happans in build version: 7.0.132.2338. And in previous build (6.0.2561.23055), that we used, error some different:

Collection was modified; enumeration operation may not execute.. System.InvalidOperationException: Collection was modified; enumeration operation may not execute.
   at System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource)
   at System.Collections.Generic.List`1.Enumerator.MoveNextRare()
   at System.Collections.Generic.List`1.Enumerator.MoveNext()
   at Mindscape.WpfElements.Charting.DataSeries.#PT()
   at Mindscape.WpfElements.Charting.Chart.#tpc()
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)

How can i solve this problem?

Best Regards, Yael

Hi Yael,

Unfortunately I have not been able to reproduce this issue. My best guess is that there may be some threading issue involved. Could you please send a simple repro project and I'll look into this further.

-Jason Fauchelle

Hello, Jason

Yes, this bug related to the threading issue, but I have already fixed it using workaround.

Regards, Yael

Great to hear you've worked around the issue.

-Jason Fauchelle