Asp.net mvc 如何在ASP.Net Identity 2中重写RefreshSign

有没有办法用ASP.NET Identity 2从ASP.NET Identity 3 SignInManager重写此方法

//
///重新生成用户的应用程序cookie，同时保留现有的
///身份验证属性，如rememberMe，作为异步操作。
/// 
///应刷新其登录cookie的用户。
///表示异步操作的任务对象。
公共虚拟异步任务RefreshSignInAsync（TUser用户）
{
var auth=新的AuthenticateContext（IdentityOptions.ApplicationCookieAuthenticationScheme）；
wait Context.Authentication.authenticateSync（auth）；
var authenticationMethod=auth.Principal？.FindFirstValue（ClaimTypes.authenticationMethod）；
等待签名同步（用户、新身份验证属性（auth.Properties）、身份验证方法）；
}

    /// <summary>
    /// Regenerates the user's application cookie, whilst preserving the existing
    /// AuthenticationProperties like rememberMe, as an asynchronous operation.
    /// </summary>
    /// <param name="user">The user whose sign-in cookie should be refreshed.</param>
    /// <returns>The task object representing the asynchronous operation.</returns>
    public virtual async Task RefreshSignInAsync(TUser user)
    {
        var auth = new AuthenticateContext(IdentityOptions.ApplicationCookieAuthenticationScheme);
        await Context.Authentication.AuthenticateAsync(auth);
        var authenticationMethod = auth.Principal?.FindFirstValue(ClaimTypes.AuthenticationMethod);
        await SignInAsync(user, new AuthenticationProperties(auth.Properties), authenticationMethod);
    }