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I am trying to migrate the WPF App with SQLite DB to net 5 and encounter the following problem on Runtime. The app complies and the resources and settings are migrated according to the documentation: https://learn.microsoft.com/en-us/dotnet/desktop/winforms/migration/?view=netdesktop-6.0

The exception is in a subclass of DbContext: System.TypeInitializationException: 'The type initializer for 'System.Data.Entity.Internal.AppConfig' threw an exception.'

  1. System.Configuration.ConfigurationErrorsException: 'Configuration system failed to initialize'
  2. ConfigurationErrorsException: Unrecognized configuration section system.web.

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I think it is something related to the Resources or Settings of the connection string.

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  • This issue is after running Upgrade Assistant, and compiling the App Commented Dec 6, 2021 at 10:25
  • After reading your error message it may be useful to know that you can't use System.Web in .NET Core to access HttpContext. You can add reference, but HttpContext wll never populate Commented Dec 6, 2021 at 10:45

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You could use instead Microsoft's upgrading tool 'Upgrade Assistant': https://learn.microsoft.com/nl-nl/dotnet/core/porting/upgrade-assistant-overview?WT.mc_id=dotnet-35129-website

Here you can follow step by step guide : https://dotnet.microsoft.com/platform/upgrade-assistant

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Thanks, but this is after running Upgrade Assistant and compiling the App

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