Code First Migration Command in C#

In MVC architecture, we creates some entities like user,role etc.

For example:

User entity:

public class User
{
    [Key]
    public int ID
    {
        get;
        set;
    }
    [MaxLength(100)]
    public string UID
    {
        get;
        set;
    }
    [MaxLength(100)]
    public string FirstName
    {
        get;
        set;
    }
    [MaxLength(100)]
    public string LastName
    {
        get;
        set;
    }
    [MaxLength(100)]
    public string DisplayName
    {
        get;
        set;
    }
    [MaxLength(100)]
    public string Identity
    {
        get;
        set;
    }
    [MaxLength(100)]
    public string Email
    {
        get;
        set;
    }
    [DataType(DataType.Password)]
    [MaxLength(100)]
    public string Password
    {
        get;
        set;
    }
    [MaxLength(100)]
    public bool IsActive
    {
        get;
        set;
    }
}

So, all these are the columns in user datatable. if you want another column called Phoneno, then add
public string Phone { get; set; } in above set.

So then if you run the solution, it throws build error as,

"Additional information: The model backing the 'EFDbContext' context has changed since the database was created. Consider using Code First Migrations to update the database (http://go.microsoft.com/fwlink/?LinkId=238269)."

At this point we have to do "Code first migration" using some command

Steps for Code First Migration:

Visual Studio13->Tools->NuGetPackageManager-> select the entity folder-> type Enable-Migrations->next type Add-Migration-> after completing two command succesfully, finally type "Update-Database". Finish then automatically the additional column will be added to user datatable.