MVC update model with Code-Migrations - asp.net-mvc

Question

I am making my project in MVC4, where i am using my Code first approach. i need to update my model
i have a following property which needs to be update , how can i achieve this
public class ContactForm
{
public char Phone { get; set; }
}
public class ConContext : DbContext
{
public DbSet<ContactForm> ContactForms { get; set; }
}
}
i want to update Phone propery to
public char Phone { get; set; }
thnx in advance, i have installed migrations to my projet already
My configuration.cs
namespace MyCRM.Migrations
{
using System;
using System.Data.Entity;
using System.Data.Entity.Migrations;
using System.Linq;
internal sealed class Configuration : DbMigrationsConfiguration<MyCRM.Models.ConContext>
{
public Configuration()
{
AutomaticMigrationsEnabled = false;
}
protected override void Seed(MyCRM.Models.ConContext context)
{
// This method will be called after migrating to the latest version.
// You can use the DbSet<T>.AddOrUpdate() helper extension method
// to avoid creating duplicate seed data. E.g.
//
// context.People.AddOrUpdate(
// p => p.FullName,
// new Person { FullName = "Andrew Peters" },
// new Person { FullName = "Brice Lambson" },
// new Person { FullName = "Rowan Miller" }
// );
//
}
}
}

Answer 1

The normal flow with EF code-first is too first update the model (a C# file) :
public class ContactForm
{
public string Phone { get; set; } //previously, this was let's say of type int
}
Then, you build your project and after that in the Package Manager Console, you have to call Add-Migration with some label (in order to rollback changes later if needed) :
Add-Migration Phone
This will add to your solution a file named like this 201409xxxxxxxx_Phone under the directory Migrations.
Then you have to put the changes to your database which can be done with the command (always in the console) :
Update-Database
Then, you should be done : the property Phone is of type string everywhere.