問題：
Got the following ProviderException : 得到以下ProviderException ：
The Role Manager feature has not been enabled. 尚未啓用角色管理器功能。
So far so good. 到現在爲止還挺好。
Is there somewhere a method that can be called to check if the Role Manager has been enabled or not? 是否有某個方法可以調用以檢查角色管理器是否已啓用？
解決方案：
參考一： https://en.stackoom.com/question/GFsN參考二： https://stackoom.com/question/GFsN