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Fixed in 5.2.4



Found in


Issue ID




[WP8.1] A concurrent or interleaved operation changed the state of the object, invalidating this operation

Windows Store Apps


1. Open the attached project "IOTests"
2. Build project for Windows Phone 8 or 8.1
3. Deloy solution to device in debug mode
4. Press button "WriteToFile"
5. Observe exception in error log
~if exception does not occur~
6. Increase amounts of elements in dictionary using button "Increase elements"
7. Rebuild dictionary using button "RebuildDictionary"
8. Return to step 4.

1. Complete steps 1-3 in above test
2. Press button "WriteToMemoryToFile"
3. Observe that the exception does NOT happen

Project was build for both WP8 and WP8.1, we the issue arose
Project was tested on device Lumia 820 running WP8.1

Regression from 4.6.x

Comments (2)

  1. kunmateo1993

    Dec 09, 2015 22:59

    So do I

  2. seccia

    Dec 09, 2015 09:58

    I have the same problem (Unity 5.3.0f4).

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