京东到家接口SDK中.Net的例子manager.CreateIdentity编译出错

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public static void SignIn(UserManager manager, ApplicationUser user, bool isPersistent)
{
IAuthenticationManager authenticationManager = HttpContext.Current.GetOwinContext().Authentication;
authenticationManager.SignOut(DefaultAuthenticationTypes.ExternalCookie);
var identity = manager.CreateIdentity(user, DefaultAuthenticationTypes.ApplicationCookie);
authenticationManager.SignIn(new AuthenticationProperties() { IsPersistent = isPersistent }, identity);


}
出错定位 manager.CreateIdentity

错误提示： 现用语言不支持“Microsoft.AspNet.Identity.UserManagerExtensions.CreateIdentity<TUser>()”

新手求帮。。。

[97866]

没人吗？自己顶一下