Materializing an ICollection structure containing subclasses

Question

I\'m reviewing some code that was written in the EF 4 days because it stands out during performance benchmarking.

The purpose of the code is to materialize an ICol

Answer 1

For those on EF Core 2.1 or later, this feature is now supported out-of-the-box.

Request from 2010:

When in an data model for entity framework has a navigation property it is not posseble to eager load that navigation property besides when using OfType<> or when eager loading the derived type itself by a navigation property.

Response from 2018:

The feature is part of EF Core 2.1, which is currently in preview. Please create issues in our issue tracker if you find any problems.