'JSON' is undefined error in IE only

Question

I\'m making an AJAX call to a WCF service and when I pass in my data i use JSON.stringify()

The call returns and works fine in FF, & Chrome, but not IE8. I get

Answer 1

JQuery 2.x is no longer compatible with IE 6-8. JQuery 2.0 beta 2 release notes

I know the main question is in regard to older versions of JQuery, but this was causing the error for me. I installed JQuery 1.x, which is API-compatible with JQuery 2.x, and added the following detection code: