EF code-first: aggiungere un nuovo campo

    public class MyDbContext : DbContext
    {
        protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {
            modelBuilder.Entity<Blog>()
                        .Property(t => t.Title)
                        .HasMaxLength(255);

            modelBuilder.Entity<Blog>()
                        .Property(t => t.BloggerName)
                        .HasMaxLength(50);
        }
    }

    public class Blog
    {
        public int Id { get; set; }
        public string Title { get; set; }
        public string BloggerName { get; set; }
    }

    public class Blog
    {
        public int Id { get; set; }
        [MaxLength(255)]
        public string Title { get; set; }
        [MaxLength(50)]
        public string BloggerName { get; set; }
    }

public class ProductConfiguration : EntityTypeConfiguration<Product>
{
    public ProductConfiguration()
    {
        ToTable("products");            
        Property(p => p.Name).HasMaxLength(255);
        Property(p => p.Version)
            .IsConcurrencyToken()
            .IsRowVersion();
    }
}

protected override void OnModelCreating(
                            DbModelBuilder modelBuilder)
{
    modelBuilder.Configurations.Add(new ProductConfiguration());
    // ...  and so on, for each configuration class

    base.OnModelCreating(modelBuilder);
}

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web.Routing;
using System.Web;

public class tipoCategoria
{
    public tipoCategoria()
    {        
    }

    public string ID
    {
        get;

        set;
    }

    public string FkPadre
    {
        get;

        set;
    }

    public string Categoria
    {
        get;

        set;
    }

    public string Tipologia
    {
        get;

        set;
    } 

    public string Status
    {
        get;

        set;
    }

    public string RealUrl
    {
        get
        {
            return Routing.RewritelUrl(Categoria.ToLower(), "-");
        }
    }

    public string Pagina(string tipo)
    {
        string url = string.Empty;

        switch (tipo)
        {
            case "corso":
                url = Routing.PageRouteCorsiCategorie(ID, RealUrl);
                break;

            case "master":
                url = Routing.PageRouteMasterCategorie(ID, RealUrl);
                break;

            case "universita":
                url = Routing.PageRouteCategorieCorsiUni(ID, RealUrl);
                break;
        }

        return url;
    }
}