Using DLL reference in d365FO

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Posted on by MS-29011540-0

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Hello all.
I created a dll in c# to encrypt data, and i used that dll as a reference in my project in D365FO, and i worked fine.
But when i check in the code so that another team member can continue working on another development machine but he couldn't use the reference in his machine despite it exists on AOT as an element in reference section.
The problem can be solved by telling him to make the reference again, but is there something i missed because i'm afraid the package is failed when deployed on the UAT

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Microsoft Dynamics AX

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KS-21091001-0 4 on at

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On the other development machine, you need to ensure, the DLL is present in the Bin folder of PackagesLocalDirectory K:\AosService\PackagesLocalDirectory\bin , and the Bin folder of your Model

K:\AosService\PackagesLocalDirectory\YourModel\bin

You would need to recreate the dll in C# all over again.

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Sohaib Cheema 49,677 Super User 2026 Season 1 on at

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When you have DLL, you must put it in the bin, so that at the compile time the system knows the existing reference. The build becomes dependent upon the DLL.

Here is an example blog-post: https://rahulmsdax.blogspot.com/2021/02/how-to-add-dll-to-tfsvsts-in-dynamics.html

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MS-29011540-0 372 on at

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@Sohaib Cheema
Thanks for your reply.
Do i need to do something if i will deploy on UAT or Production?

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Sagar121 1,160 Super User 2026 Season 1 on at

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I hope you are creating the package from ADO pipeline only. Just make sure you have checked in the DLL to the correct Bin folder in repo.

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MS-29011540-0 372 on at

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@Sagar121
UAT and Production are on-premise
Do I need to do something?

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Sohaib Cheema 49,677 Super User 2026 Season 1 on at

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Hi @MS-29011540-0

It doe snot matters On-Prem or Cloud, the package is generated in the same way, build is done in the same way.

Did you read the blog-post, that shows you steps, about how you can add DLL

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MS-29011540-0 372 on at

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@Sohaib Cheema
Yes, I do read it.
How can I go to K:\AOSService\PackagesLocalDirectory\[package]\bin\ in cloud UAT or Production environment?
I mean If I created a package on a server that i referenced the DLL, would it be embedded inside the package?

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Martin Dráb 239,040 Most Valuable Professional on at

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You won't "go" to the folder. The file will be put there by the process installing deployable packages to sandbox and production environments. You just need to make sure that your build pipeline includes the file when creating the deployable package.

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