using System;

using Microsoft.EntityFrameworkCore;

public class Program

{

    public static void Main()

    {

        var db = new MyDb();

        db.Database.Migrate();

    }

}

​

public class MyDb : DbContext

{

    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)

    {

        optionsBuilder.UseSqlServer("Server=.");

    }

​

    protected override void OnModelCreating(ModelBuilder modelBuilder)

    {

        modelBuilder.Entity<Parent>(builder => {

            builder.ToTable("ParentTable", t => t.IsTemporal());

            builder.HasKey(t => t.Id);

​

            builder

                .OwnsOne(t => t.ChildProp, childBuilder =>

                {

                    childBuilder 

                        .Property(t => t.Amount)

                        .IsRequired()

                        .HasPrecision(18, 2)

                        .HasColumnName("Parent_Amount");

​

                    childBuilder 

                        .Property(t => t.Currency)

                        .IsRequired()

                        .HasColumnName("Parent_Currency");

                });

            });

    }

    public DbSet<Parent> Parents {get;set;}

}

​

public class Parent

{

    public Guid Id {get;set;}

    public Child ChildProp {get;set;}

}

​

public class Child

{

    public decimal Amount{get;set;}

    public string Currency {get;set;}

}