https://github.com/VsixCommunity/Community.VisualStudio.Toolkit.DependencyInjection/blob/fab19a4e202839f5300eb7139009aa8e5daa7859/src/Core/17.0/Community.VisualStudio.Toolkit.DependencyInjection.Core.17.0.csproj#L11 this causes issue for me when adding my extension in to VS shellx64. could you update to latest? (v8)