Subscribe to comments of blogs: Subscribe an email address to comments
After you create and Subscribe to comments of blogs: Register the new comment notifications strategy, you need to obtain the subscriber’s email address by using a form submit or a custom web service.
Obtain the thread key of the comments, using the blog post ID. Use the following sample:
Next, subscribe to the respective thread type by using the Subscribe method of the comment service that calls a method with the same signature from the currently registered ICommentNotificationsStrategy. To subscribe, copy the following code in the Bootstrapper_Initialized method that you can use in the Global.asax file or, depending on your needs, in any widget, service, and so forth: