Logic Apps Functions allow Azure.Core?

Question

Logic Apps Functions allow Azure.Core?

Jesse 0

Apr 6, 2025, 12:28 AM

I am trying to access certain functionality using "call a local function" in my standard logic app. Does Logic App not support calling libraries that require Azure.Core Libraries? My function uses Azure.Core and my logic app fails at the runtime saying Azure.Core is missing. I did verify the assemblies section in my Logic Apps and I see Azure.Core.

Siddhesh Chavan 0 Reputation points

Apr 6, 2025, 6:16 AM
Hello Jesse
When you call a local function in Logic Apps (via inline code or function app), it runs in a sandboxed environment. Even if the Azure.Core library is listed in your assemblies section, it doesn't necessarily mean it's fully supported or available at runtime the way it is in a regular Function App or Azure App Service.

The error you're seeing — about Azure.Core being missing — typically means:

The assembly is referenced, but

The runtime can’t load or resolve it properly in the logic app environment.

If your logic requires Azure.Core or other complex dependencies:

Build your code as a separate Azure Function App (C#) using Visual Studio.

Deploy it to Azure.

Then use "HTTP action" in your Logic App to call that function.
Shireesha Eeraboina 2,650 Reputation points Microsoft External Staff

Apr 7, 2025, 5:06 AM

Hello Jesse,

Just checking in to see if the above answer provided by @Siddhesh Chavan helped.

if you have any further query do let us know.
Jesse 0 Reputation points

Apr 7, 2025, 5:17 AM

Thank You, I will try Siddhesh Chavan suugestion!
Jesse 0 Reputation points

Apr 7, 2025, 1:49 PM

I do have another question Does Isolated vs in-process have anything to do here? Also is it possible to know what functionality is not supported?
Shireesha Eeraboina 2,650 Reputation points Microsoft External Staff

Apr 9, 2025, 3:49 AM

Hello Jesse,

Following up to see if you have a chance to check my previous response and helped do let me know if you have any further questions on this.
Siddhesh Chavan 0 Reputation points

Apr 9, 2025, 3:52 AM

Hello Jesse,

please like my comment if that has helped you
Shireesha Eeraboina 2,650 Reputation points Microsoft External Staff

Apr 10, 2025, 5:25 AM

Hello Jesse,

Following up to see if you have a chance to check my previous response and helped do let me know if you have any further questions on this.

1 answer

Your answer

Siddhesh Chavan 0 Reputation points

Apr 6, 2025, 6:16 AM

Hello Jesse
When you call a local function in Logic Apps (via inline code or function app), it runs in a sandboxed environment. Even if the Azure.Core library is listed in your assemblies section, it doesn't necessarily mean it's fully supported or available at runtime the way it is in a regular Function App or Azure App Service.

The error you're seeing — about Azure.Core being missing — typically means:

The assembly is referenced, but

The runtime can’t load or resolve it properly in the logic app environment.

If your logic requires Azure.Core or other complex dependencies:

Build your code as a separate Azure Function App (C#) using Visual Studio.

Deploy it to Azure.

Then use "HTTP action" in your Logic App to call that function.
Shireesha Eeraboina 2,650 Reputation points Microsoft External Staff

Apr 7, 2025, 5:06 AM

Hello Jesse,

Just checking in to see if the above answer provided by @Siddhesh Chavan helped.

if you have any further query do let us know.
Jesse 0 Reputation points

Apr 7, 2025, 5:17 AM

Thank You, I will try Siddhesh Chavan suugestion!
Jesse 0 Reputation points

Apr 7, 2025, 1:49 PM

I do have another question Does Isolated vs in-process have anything to do here? Also is it possible to know what functionality is not supported?
Shireesha Eeraboina 2,650 Reputation points Microsoft External Staff

Apr 9, 2025, 3:49 AM

Hello Jesse,

Following up to see if you have a chance to check my previous response and helped do let me know if you have any further questions on this.
Siddhesh Chavan 0 Reputation points

Apr 9, 2025, 3:52 AM

Hello Jesse,

please like my comment if that has helped you
Shireesha Eeraboina 2,650 Reputation points Microsoft External Staff

Apr 10, 2025, 5:25 AM

Hello Jesse,

Following up to see if you have a chance to check my previous response and helped do let me know if you have any further questions on this.

Answer 1

Hello Jesse,

When using Azure Logic Apps, local functions (inline code) run in a sandboxed, in-process environment, which can limit support for certain libraries like Azure.Core. Even if it's listed in the assemblies, it may not work as expected at runtime.

Regarding your question: Yes, the Isolated Process model in Azure Functions offers more flexibility and better support for complex dependencies like Azure.Core. Logic Apps use an in-process model for inline code, which has limitations.

If your code needs Azure.Core or other advanced libraries, the best approach is to move it into an Azure Function App (Isolated) and call it from your Logic App using an HTTP action.

For your reference, please review the following documentations for further clarifications:

I hope this addresses your query. Please let me know if you need any further assistance or clarification.

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Logic Apps Functions allow Azure.Core?

1 answer

Your answer