.NET 4.5 WinFormsSynchronizationContext changes

Question

At the breaking change notes for .NET 4.5 there is following entry for the SynchronizationContext.Current property. Quote:

Change: In the .NET Framework 4.5, Windows Forms no longer overrides a null synchronization context.
Impact: This change may break an application that assumes that the synchronization context is always non-null.

Does anyone know details about this change? Making a new 4.5 WinForms app still sets the SynchronizationContext when a Control subclass constructor is called, so I'm clueless about what this "breaking change" means. I'm worried about this because we are using SynchronizationContext extensively and I need to evaluate the impact of running on .NET 4.5 (especially since its not an option to run on 4.0 if the end user has 4.5 installed).

Answer 1

Hi Tobias,

I will invoke other engineer in this issue.

Best Regards,

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Bob Wu [MSFT]
MSDN Community Support | Feedback to us

Answer 2

Please disregard this breaking change.  It was actually reverted back to the 4.0 behavior prior to release but wasn’t removed from the list.  I have submitted a request to remove it from the MSDN document which should happen in a few weeks.

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Trevor Hancock (Microsoft)
Please remember to "Mark As Answer" the replies that help.

Answer 3

Thank you for your answer !