'System.PlatformNotSupportedException' and 'System.Configuration.ConfigurationErrorsException' in System.Configuration.ConfigurationManager.dll

[ivan2007]

Description

Win32 app that calls a c++/cli NET Core 3.1 lib. The c++/cli lib calls a WPF NET Core 3.1 lib
Running the app the output window of VS shows:
'System.PlatformNotSupportedException' in System.Configuration.ConfigurationManager.dll
'System.Configuration.ConfigurationErrorsException' in System.Configuration.ConfigurationManager.dll
You can find more details here and here
The test project can be found here

Configuration

NET Core 3.1
architecture x64

[ghost]

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Issue Details

---

Description

Win32 app that calls a c++/cli NET Core 3.1 lib. The c++/cli lib calls a WPF NET Core 3.1 lib
Running the app the output window of VS shows:
'System.PlatformNotSupportedException' in System.Configuration.ConfigurationManager.dll
'System.Configuration.ConfigurationErrorsException' in System.Configuration.ConfigurationManager.dll
You can find more details here and here
The test project can be found here

Configuration

NET Core 3.1
architecture x64

Author:	ivan2007
Assignees:	-
Labels:	area-System.Configuration, untriaged
Milestone:	-

[ericstj]

Duplicate of #25027, already fixed in 5.0.

These are first chance exceptions. Can you clarify how your application is impacted by this issue?

[ivan2007]

Ok, I only followed the suggestion of @SamBent. I am not trying to use an app.exe.config file so for this issue I am fine

[ericstj]

Thanks for the clarification