Entity framework Map : EntityTypeConfiguration auto add to DbContext

public class Customer
{
 public int Id { get; set; }
...........................
}

public partial class CustomerMap : EntityTypeConfiguration<Customer>
    {
        public CustomerMap()
        {
            this.ToTable("Customer");
            this.HasKey(c => c.Id);
            this.Property(u => u.Username).HasMaxLength(1000);
            this.Property(u => u.Email).HasMaxLength(1000);
            this.Property(u => u.Password);
            this.Property(c => c.AdminComment);
            this.Property(c => c.CheckoutAttributes);
            this.Property(c => c.GiftCardCouponCodes);

            this.Ignore(u => u.PasswordFormat);
            this.Ignore(c => c.TaxDisplayType);
            this.Ignore(c => c.VatNumberStatus);

            this.HasOptional(c => c.Language)
                .WithMany()
                .HasForeignKey(c => c.LanguageId).WillCascadeOnDelete(false);

            this.HasOptional(c => c.Currency)
                .WithMany()
                .HasForeignKey(c => c.CurrencyId).WillCascadeOnDelete(false);

            this.HasMany(c => c.CustomerRoles)
                .WithMany()
                .Map(m => m.ToTable("Customer_CustomerRole_Mapping"));

            this.HasOptional(c => c.Affiliate)
                .WithMany()
                .HasForeignKey(c => c.AffiliateId);

            this.HasMany<Address>(c => c.Addresses)
                .WithMany()
                .Map(m => m.ToTable("CustomerAddresses"));
            this.HasOptional<Address>(c => c.BillingAddress);
            this.HasOptional<Address>(c => c.ShippingAddress);
            this.HasOptional<Gift>(c => c.SelectedGift);

            this.HasMany<Patient>(c => c.Patients)
                .WithMany()
                .Map(m => m.ToTable("CustomerPatients"));
        }
    }




public WebCmsDbContext() : base(EngineContext.Current.Resolve<DbSettingModel>().DataConnectionString)
        {
            //((IObjectContextAdapter) this).ObjectContext.ContextOptions.LazyLoadingEnabled = true;
        }

        protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {
            //dynamically load all configuration
            //System.Type configType = typeof(LanguageMap);   //any of your configuration classes here
            //var typesToRegister = Assembly.GetAssembly(configType).GetTypes()

            var typesToRegister = Assembly.GetExecutingAssembly().GetTypes()
            .Where(type => !String.IsNullOrEmpty(type.Namespace))
            .Where(type => type.BaseType != null
                && type.BaseType.IsGenericType
                && type.BaseType.GetGenericTypeDefinition() == typeof(EntityTypeConfiguration<>));

            foreach (var type in typesToRegister)
            {
                dynamic configurationInstance = Activator.CreateInstance(type);
                modelBuilder.Configurations.Add(configurationInstance);
            }

            //...or do it manually below. For example,
            //modelBuilder.Configurations.Add(new LanguageMap());
           
            base.OnModelCreating(modelBuilder);

            //modelBuilder.Conventions.Remove<OneToManyCascadeDeleteConvention>();
        }

automataar DbContext -ruu Entity class nemj bn. EntityTypeConfiguration<> ajiglaarai
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