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Home/ Questions/Q 7913619
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Editorial Team
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Editorial Team
Asked: June 3, 20262026-06-03T13:53:18+00:00 2026-06-03T13:53:18+00:00

I have a custom class, with a property ID. We can name this class

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I have a custom class, with a property ID. We can name this class A, and the property ID.

I have an observable collection of A, and I would like to get the firstOrDefault to know if an object exists with a determined ID. Soy I do the following:

myObersableCollection.FirstOrDefault(a=>a.ID==2)

But I get the following error: it is not possible to convert implicitly A into bool.

What am I doing wrong?

Thanks.
Daimroc.

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  1. Editorial Team
    Editorial Team
    2026-06-03T13:53:19+00:00Added an answer on June 3, 2026 at 1:53 pm

    FirstOrDefault() returns a matching object, not a boolean.

    If you just want to check whether there is a matching object, call .Any() instead.

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