Hashtag functionality like Instagram using C#

Question

I want to implement (#)Hashtag functionality in c#.what will be the best approach for the same? The user can also follow the hashtag like(#newPost,#Feeds,#follow,#FollowforFollow).each of them having the page where the user can follow these hashtag. Apart from that if the user will post any new feed then he/she can use the hashtag in their post.

 

So how we will manage the #hastag and all hashtag related functionality?

 

Thanks in Advance Satyam