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Home/ Questions/Q 8734353
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Editorial Team
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Editorial Team
Asked: June 13, 20262026-06-13T09:49:34+00:00 2026-06-13T09:49:34+00:00

I have a project using Reactive Extensions and ReactiveUI. I upgraded to the pre

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I have a project using Reactive Extensions and ReactiveUI. I upgraded to the pre release version and I have the following line of code

    OAPHCreationHelperMixin.ObservableToProperty(observable,
                                                 Function(x) x.Value

Visual studio tells me there is an error here on the method ObservableToPropertyin that the following assembly is missing

    Error   9       
    C:\Users\phelan\workspace\WeinMeasEval\WeinMeasEval\Global\ObservableBinding.vb 
    Reference required to assembly 
    'System.Reactive.Interfaces, 
    Version=2.0.20823.0, 
    Culture=neutral, 
    PublicKeyToken=31bf3856ad364e35' 
    containing the type 'System.Reactive.Concurrency.IScheduler'. Add one to your project.       

Now I click the link which suggests it will add the reference and then nothing
happens. If I look in my project references I see that the assembly is indeed
in the assembly list and it is the correct version 2.0.20823.0 and if I look on
the path the DLL is indeed there.

Any ideas?

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  1. Editorial Team
    Editorial Team
    2026-06-13T09:49:35+00:00Added an answer on June 13, 2026 at 9:49 am

    This is now fixed, check out ReactiveUI 4.0 Preview 5

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