How to determine what version of .Net Framework is being used by server?

Question

User178896576 posted

I've seen a couple of items on the web about going to regedit and looking at HKLM>Software>NET Framework Setup>NDP and seeing what version folders exist to determine the running version. On the machine I'm working on, I have v2.0.50727, v3.0, v3.5, v4, and v4.0.

I'm trying to run v4.5, and I have installed it via the online download. I do not know if there should be a v4.5 folder at the registry location I mentioned, but it seems like there should be.

The problem I'm having is when I run an sdpx page off the server, I get an error stating Unrecognized attribute 'targetFramework'. So, this I assume is telling me that the server is not using the 4.5 framework. If I take out the targetFramework attribute from the config.web files, I get another error saying it cannot locate System.Web.Extensions v4.0.0.0. I have the site's application pool set to .Net 4.0.

Any help would be greatly appreciated.

Answer 1

User-183374066 posted

Try following options

• One way is to throw an exception in Page Load, but don't catch it. At the bottom of the page, you'll see the version number.
• dropped <%=Environment.Version%> on a page

http://stackoverflow.com/questions/37468/how-to-determine-the-installed-asp-net-version-of-host-from-a-web-page

http://stackoverflow.com/questions/198931/how-do-i-tell-if-net-3-5-sp1-is-installed see Matt's reply

Answer 2

User178896576 posted

Well, I tried the <%=Environment.Version%>  thing, and the error page actually showed that:

Version Information: Microsoft .NET Framework Version:2.0.50727.5466; ASP.NET Version:2.0.50727.5456

I have the site's application pool set to the default app pool which says it's running 4.0.

Now what?

Answer 3

User-1716253493 posted
change related application pool to use net 4 version

Answer 4

User178896576 posted

I had the site set to the default app pool and selected 4.0.

Answer 5

User-1716253493 posted

Maybe your app not using default pool, if using default app pool, it should work or saying net 4 error.

Just make sure what is app pool name used by your app (site or virtual directory), which net version used by this app pool