Shankar

Yes I use netcoreapp3.1 and not netstandard. WPF needs atleast .NET core 3.0

The error won't show when there are no shared types or assemblies

Hey @natemcmaster, I have the reproduceable repo here [ShankarBUS/ExtensibilityTest](https://github.com/ShankarBUS/ExtensibilityTest) - commit [34cc7cd](https://github.com/ShankarBUS/ExtensibilityTest/commit/34cc7cdf7916aad3eb4395800cc996625ce87c44) will throw a **System.IO.FileNotFoundException** saying `"Could not load file or assembly 'System.Data.SqlClient, Version=4.6.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. The system cannot...

What's the .NET Core SDK you're using. It may be rooting from the sdk maybe. Mine is 3.1.400-preview-015151

 Still experiencing the bug 😞

No I asked the .NET Core 3.1 SDK version installed in your system that you used to build my repo

> One of the errors I found in your repo is in debug mode in output path for MyExtension dlls storage. > Must be "Debug" instead "Release". > Verifiy it...

Hmmm... [This branch](https://github.com/ShankarBUS/ExtensibilityTest/tree/BugFix2) seems to work. I removed this ```cs [assembly: ThemeInfo( ResourceDictionaryLocation.None, //where theme specific resource dictionaries are located //(used if a resource is not found in the page,...

Hey @natemcmaster, I can't choose to remove AssemblyInfo.cs since it has `InternalsVisibleTo `and `XmlnsDefinition `attributes. Any help?

Hey @Teknel, I can't find a best example issue repro. Mine seems to be confusing. Can you provide a repro of your issue and I will update this issue to...