XmlnsDefinition must map to an existing namespace
ProprietaryFlags an [assembly: XmlnsDefinition] whose clrNamespace argument names a namespace that no source file declares, so the mapping exports nothing.
OpenRewrite. Recipes. CSharp. CodeQuality. Wpf. FindXmlnsDefinitionForMissingNamespacemod run . --recipe= OpenRewrite. Recipes. CSharp. CodeQuality. Wpf. FindXmlnsDefinitionForMissingNamespaceInstall it once, then run it on every repository under the current directory. New to the Moderne CLI? Set it up.