How do I force IE to load site with .net framework 3.5?

Question

I have a web app then needs framework 3.5 to run. A system update keeps installing framework 4.5, this breaks the web app. I updated the web.config and even tried an app config for IE (config listed below). But neither work, I downloaded processactivityview tool to see what was going on. It seems to load framework 4.5 before reading the config file.

How can I force the IE to load this page with framework 3.5?

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <startup>
        <supportedRuntime version="v2.0.50727"/>
    </startup>
</configuration>

Answer 1

如果您有权访问IIS，请在IIS中为FW 3.5创建新的应用程序池，并将您的应用程序分配给它。