OnModelCreating

OnModelCreating.cs

protected override void OnModelCreating(ModelBuilder modelBuilder)
{
    modelBuilder.Entity<Customer>()
        .ToTable("DimCustomer");

    modelBuilder.Entity<Customer>()
        .HasKey("CustomerKey");

    modelBuilder
        .Entity<Customer>()
        .Property(c => c.BirthDay)
        .HasColumnName("BirthDate")
        .HasConversion(
            birthDay => new DateTime(birthDay.Year, birthDay.Month, birthDay.DayOfMonth),
            birthDate => new BirthDay
            {
                Year = birthDate.Year,
                Month = birthDate.Month,
                DayOfMonth = birthDate.Day,
            });

    base.OnModelCreating(modelBuilder);
}