IDbAsyncEnumerable not implemented

Question

I am trying to make a FakeDbContext with a FakeDbSet for unit testing.

But I get the following error (see below). I am extending DbSet so normally IDbAsyncEnumerable

Answer 1

In my case the exception was caused by using the wrong ToListAsync extension.

It came from:

using System.Data.Entity;

instead of

using Microsoft.EntityFrameworkCore;

Changing the namespace fixed the error.