当我运行我的webforms应用程序时，不会调用我的EF种子方法

Question

我有一个webforms应用程序，它调用一个服务然后使用EF来获取一个对象。我在应用程序运行时添加了一个种子例程来填充我的数据库，但WCF上的登录函数不会返回结果。我认为这是因为我的种子方法没有运行，我错过了什么？

上下文

public class UserTaskContext : DbContext
{
    public DbSet<User> Users { get; set; }
    public DbSet<UserTask> UserTasks { get; set; }

    public UserTaskContext()
        : base("Local")
    {
        Configuration.AutoDetectChangesEnabled = true;
        Configuration.LazyLoadingEnabled = true;
        Configuration.ProxyCreationEnabled = true;
        Configuration.ValidateOnSaveEnabled = true;
    }
}

迁移配置

internal sealed class Configuration : DbMigrationsConfiguration<TODO.DataAccessLayer.UserTaskContext>
{
    public Configuration()
    {
        AutomaticMigrationsEnabled = false;
    }

    protected override void Seed(TODO.DataAccessLayer.UserTaskContext context)
    {
        context.Users.Add(new User { Id = Guid.NewGuid(), Password = "password", Username = "username" });

        context.UserTasks.Add(new UserTask
        {
            Id = Guid.Parse("c9de7364-049b-4ad2-9f75-ba142fe16d1a"),
            Name = "Site",
            Summary = "Finish this project",
            DueDate = DateTime.Now,
            CreatedDate = DateTime.Now.AddDays(2),
            Completed = true
        });

        context.SaveChanges();
    }
}

WCF服务（通过我的网络表单中的按钮点击调用）

public class UserService : IUserService
{
    public User Login(string username, string password)
    {
        if (string.IsNullOrEmpty(username) || string.IsNullOrEmpty(password))
        {
            throw new Exception("Users name or password cannot be empty");
        }

        User user = null;
        using (var userContext = new UserTaskContext())
        {
            user =
                userContext.Users.FirstOrDefault(
                    u => u.Username.Equals(username, StringComparison.InvariantCulture) &&
                         u.Password.Equals(password, StringComparison.InvariantCulture));

        }
        return user;
    }

    public List<User> GetUsers()
    {
        List<User> users = null;
        using (var context = new UserTaskContext())
        {
            users = context.Users.ToList();
        }
        return users;
    } 
}