Arthur Vickers

@amoorthaemer You can create and use your own implementation of `IProxyFactory`, deriving from the EF Core default implementation or not as you choose.

Note from triage: consider supporting the `OfType` syntax.

@risperdal Please post your csproj file.

@akinsoftyazilim42 Remove `Npgsql.EntityFrameworkCore.PostgreSQL.Design`. It's an obsolete package.

@ansquero This is a downside of lazy-loading proxies. That is, the database can be queried when it should not be because there is now no difference between accessing a property...

> if an FK exists, I can't see any case where it's relevant to run a query when accessing a collection type navigation property on an entity in the added...

@bricelam Can you take a look at this?

Note for triage: I suspect the issue here is that VS package is bringing Mono.TextTemplating 2.3.1, but EF seems to require 2.2.1.

Notes for triage: The underlying issue here is that `Mono.TextTemplating` 2.2.1 loads the assembly into the default load context, which allows it to use types created by the EF tooling...

@mhutch I tried first with the latest preview package, and that still failed. But then I built packages locally from your main branch and used those, and all the tests...