How to include jQuery in ASP.Net project?
You can download the latest version of jQuery and then include it in your page with a standard HTML script tag or can use CDNs available from Google, Microsoft and give the CDN URL in ASPX page.
You can download latest version from.... Download jQuery and include the script file directly in your asp.net master page .
Using Content Delivery Network
Alternatively you can use a content delivery network (CDN) to deliver your jQuery. Both Google and Microsoft host jQuery. Using a content delivery network (CDN) can help improve performance of your jQuery (and website as a whole).