How can NodaTime be used with EF Code First?

Question

I really want to be able to use NodaTime in my Entity Framework Code First database projects but haven\'t found a \"clean\" way to do it. What I really want to do is this:<

Answer 1

EF Core 2.1 has a new feature Value Conversions, which is exactly for this scenario.

//OnModelCreating
builder.Entity
       .Property(e => e.SomeInstant)
       .HasConversion(v => v.ToDateTimeOffset(), v => Instant.FromDateTimeOffset(v));

.HasConversion has some other overloads to make this logic re-useable, for example you can define your own ValueConverter.