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Editorial Team
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Editorial Team
Asked: May 17, 20262026-05-17T23:41:06+00:00 2026-05-17T23:41:06+00:00

It is well-known that you cannot update the UI from any other thread other

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It is well-known that you cannot update the UI from any other thread other than the UI thread.

However, I just discovered some code, that gets a value of a listview virtualsize, from a non-UI thread without Exception.

So really my question is:
what interaction can you have with the UI from a non-UI thread?

Thank you
Theo

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  1. Editorial Team
    Editorial Team
    2026-05-17T23:41:06+00:00Added an answer on May 17, 2026 at 11:41 pm

    Because it works without throwing an exception, does not mean you should do this.

    The problem is that besides the Invoke requirement for methods that update the UI, these controls also do not support multi threading. That means that when the UI thread updates the data while you are retrieving it, you do get corrupt data.

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