This is correct! .Net 3.0 and 3.5 are extensions of the .Net 2.0 framework. If .Net 2.0 is enabled on your website, then your application has access to the 3.0 and 3.5 libraries and features. .Net v4.5 replaces the 4.0 framework installation and adds its features and functionality. If your website has .Net 4.x enabled, then your application has access to the 4.0 and 4.5 libraries and features.