Error Upgrading Blazor from 3.1 to 5.0 "does not have a property matching the name 'PreferExactMatches'"

The MS migration document was in front of the patch release. (The document is edited in the meantime). The property PreferExactMatches is not yet released, but will be next days.

https://github.com/dotnet/AspNetCore.Docs/issues/20838