在VB中使用OWIN

Question

我正在尝试设置一些密码策略，我设法在C＃中成功完成此操作，但我需要将代码转换为VB。有两个问题我无法弄清楚：

1）app.UseUserManagerFactory不存在;

说明UseUserManagerFactory is not a member of Owin.IAppBuilder

2）实例化OnCreate时Provider属性未正确传递

Public Sub ConfigureAuth(app As IAppBuilder)
   'Configure the UserManager
   app.UseUserManagerFactory(New IdentityFactoryOptions(Of ApplicationUserManager)() With { _
   .DataProtectionProvider = app.GetDataProtectionProvider(), _
   .Provider = New IdentityFactoryProvider(Of ApplicationUserManager)() With { _
      .OnCreate = ApplicationUserManager.Create _
   } _
})

为了完整起见，这是Create函数：

Public Shared Function Create(options As IdentityFactoryOptions(Of ApplicationUserManager))           
   Dim manager = New ApplicationUserManager(New ApplicationUserStore(New ApplicationDbContext()))
   manager.UserValidator = New UserValidator(Of ApplicationUser)(manager) With {.AllowOnlyAlphanumericUserNames = False, .RequireUniqueEmail = True}
   manager.PasswordValidator = New PasswordValidator()

   Dim dataProtectionProvider = options.DataProtectionProvider
   If (dataProtectionProvider IsNot Nothing) Then
      ' Do stuff
   End If

   Return manager
End Function

任何帮助都会受到赞赏，我的VB技能加上缺乏文档让我摸不着头脑。