public ProductConfiguration()
{ //Many to Many configuration
HasMany(Pc => Pc.Providers)
.WithMany(Pr => Pr.Products)
.Map(M =>
{
M.ToTable("Providings"); //Table of association
M.MapLeftKey("Product");
M.MapRightKey("Provider");
});
//One To Many if you need 0..* use HasOptional()
HasRequired(Pc => Pc.MyCategory)
.WithMany(C => C.Products)
.HasForeignKey(Pc => Pc.CategoryId)
.WillCascadeOnDelete(false);
//TPH
Map <Biological>(B => B.Requires("isBiological").HasValue(1));
Map <Chemical>(Ch => Ch.Requires("isBiological").HasValue(0));
}