小编da7*_*rak的帖子

我正在尝试UserProfile在我的模型中向类添加新属性

public class UserProfile
{
    [Key]
    [DatabaseGeneratedAttribute(DatabaseGeneratedOption.Identity)]
    public int UserId { get; set; }
    public string UserName { get; set; }
    [Required]
    [DataType(DataType.EmailAddress)]
    [Display(Name = "Email Address")]
    public string Email { get; set; } \\this is the new property
    public virtual IList<Game> Games { get; set; }
}

我试图将它添加到我的Configurations.cs文件中的种子方法

private void SeedMembership()
    {
        WebSecurity.InitializeDatabaseConnection("MafiaContext",
            "UserProfile", "UserId", "UserName", autoCreateTables: true);

        var roles = (SimpleRoleProvider)Roles.Provider;
        var membership = (SimpleMembershipProvider)Membership.Provider;

        if (!roles.RoleExists("Administrator"))
        {
            roles.CreateRole("Administrator");
        }
        if (membership.GetUser("drew", false) == …