Read PDF or HTML page and get data from it using vb.net or c#.net

HTML:
Please make sure which content you have to read bcoz every website has the style of content. So you can read it using jquery or javascript by locating and fetching the tag values of HTML page like < title > , < h1 > , < h2 > , < h3 > , < P > , etc..
You wud have to send the wepage html url to javascript or jq code..
if you read it through the javascript or jquery from the client side, you can send those data to server side through hiddenfields..
 
PDF
And i have no idea to access to PDF contents. We have thirdparty softwares for this.