If you didn't notice, Entity Framework Core 2.1 has a new way to support seeding your databases with a method called HasData. Julie Lerman has a great new Data Points column in MSDN that explains how a lot of it works.
Go read that article first. It really covers the basics. Unfortunately, for my use, her article missed a tiny detail that I think is useful. But let's start with a brief overview of how HasData works.
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