How can I create a search engine in C#?

Hi,

I mean I want to make a search engine as explained in below:

1. I need to extract the public data of  a social network as facebook or tweeter and somehow both of them , and save it in my search engine database then sort the data have extracted in a logical way.

2. then I want to create a page as search engine page like google and when I enter the name or last name of a person if he or she is a member of these social networks then the public data which have been extracted before was displayed in a new page as result page and if he or she isn't the member of these social networks then a message is displayed that " He or She isn't the member of the social networks you have chosen.

 

So, please guide me and help me to create this kind of search engine .

Thank you.