public enum ProductType
{
    Type1,
    Type2
}

public class Product
{
    public int ProductTypeId{get;set;}
    public ProductType ProductType
    {
        get
        {
            return (ProductType)ProductTypeId；
        ｝
        set
        {
            ProductTypeId = (int)value;
        }
    }
}

    public partial class ProductMap : EntityTypeConfiguration<Product>
    {
        public ProductMap()
        {
            this.ToTable("Product");
            this.HasKey(p => p.Id);
            this.Property(p => p.Name).IsRequired().HasMaxLength(400);
            this.Property(p => p.MetaKeywords).HasMaxLength(400);
            this.Property(p => p.MetaTitle).HasMaxLength(400);
            this.Ignore(p => p.ZupoProductType);
            this.Property(p => p.ZupoProductTypeId)
                    .HasColumnName("ProductType");

            this.HasMany(p => p.ProductTags)
                .WithMany(pt => pt.Products)
                .Map(m => m.ToTable("Product_ProductTag_Mapping"));
        }
    }