The 'ReadMe' file in the project is very helpful, however, when I finished all the steps, the web page that I opened just says 'Access Denied'.  This is because you haven't configure the permission in the SharePoint yet, it's just like the relation between AD and SharePoint. You are authenticated in AD, and you also have to be authenticated in SharePoint too.

Keep this in mind, now you just go to the central admin and change the site collection admin to the Live ID that you are using, and then you could access the page with the admin rights and you could do other configuration such as add the 'Authenticated Live Users' role to the SharePoint Visitor, etc.

CKS中的这个Live ID开源项目的ReadMe文件说得很详细，但是当我按照所有步骤做完之后，却总是说Access Denied,查了半天解决办法,发现这个问题的原因就是还没有在SharePoint中配置访问权限。他们之间的关系就如同Active Directory 和SharePoint，你通过了AD验证，却不一定具有SharePoint权限。可是我已经改了这个应用的访问控制方法，该如何添加用户呢？我的解决方法如下：

首先在中央管理器的站点上要运行一下那个新添加的stsadm操作，

stsadm.exe -o addwindowsliveauth -appid <application id> -appkey <application secret key> -appmode <http/https - this is what url your users use> -profsite <URL of site that contains the profile list> -proflist <user profile list name> -locked <URL to send locked users to> -url <URL of the Central Administration>

然后可以打开中央管理器，选择Site Collection Administrator管理，选中需要修改的Applilcation，把这个管理员修改成Live ID用户。（查找用户的方法是，要么从开始时候设置的用户数据存储列表里面找到对应的ID，要么查看那个Access Denied的界面，这里会提示出用户ID，用这个ID就可以查到Live ID用户了。）修改之后，就可以访问界面了，如果Web.config中的设置和ReadMe文件中的一致，就可以进行接下来的配置，比如为所有Authenticated Live Users 配置访问权限。

另外，这个源代码还具有一定的可扩展性，可以根据自己的需要进行下一步修改。