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Calling a c# library from d365fo finance & get a reference error during build

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Posted on by ZH-29041953-0

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https://learn.microsoft.com/en-us/dynamics365/fin-ops-core/dev-itpro/dev-tools/write-business-logic
I'm following this post step-by-step to call a c# library from my d365fo finance code.
I'm getting this reference error:

I checked 'add reference' in my x++ project, there's no matching .net reference of this one.
Has anyone seen an error like this before?

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Waed Ayyad 8,972 Super User 2025 Season 2 on at

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Calling a c# library from d365fo finance & get a reference error during build

Hi @Zeyu Hu,

Did you add using Your reference library in your D365 FO code?

Regards,

Waed Ayyad.

Please mark this answer as "Verified" if it solved your issue. In order to help others who will face a similar issue in the future

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ZH-29041953-0 14 on at

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Calling a c# library from d365fo finance & get a reference error during build

It turns out I was using WPF platform c# library, hence the error. Using .Net platform should solve the issue

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