IE running .NET 1.1 even though 2.0 installed

Thread view:

Enable EMail Alerts

Start New Thread

Thread rating:

Jesse Smith - 22 Sep 2006 21:07 GMT

My understanding is that Internet Explorer will always run the latest
installed version of the .NET framework when hosting controls. While
investigating a problem with a VS2005 / .NET 2.0 control that we host in IE,
I began to suspect based on the fusion bind error log that the browser was
running .NET 1.1 even though 2.0 was also installed.

To verify this, I developed a very simple control using VS2003 / .NET 1.1
that merely displays the result of System.Environment.Version.ToString().
Sure enough, on the systems we are having problems on, the simple control
displays 1.1.4322.2032, even though 2.0 has been installed. All of the
"working" systems display 2.0.50727.42.

I tried uninstalling and reinstalling 2.0 on a couple of the machines but
the result did not change. Any ideas what would cause IE to run .NET 1.1
even when a newer .NET framework is present?

Thanks,
Jesse

Reply to this Message

Linda Liu [MSFT] - 25 Sep 2006 08:19 GMT

Hi Jesse,

When we host .NET Windows Forms controls in a web page and browse the web
page in IE, IE uses an assembly called IEHost.dll to host the .NET Windows
Forms controls in it.

Every version of .NET Framework has an IEHost.dll assembly. If IE is using
the IEHost.dll assembly of .NET 1.1 version, .NET 1.1 is loaded. If IE is
using the IEHost.dll of .NET 2.0 version, .NET 2.0 is loaded.

Generally speaking, when a newer version of .NET Framework is installed, IE
will use the newer version IEHost.dll assembly. If IE on your machine
doesn't use the IEHost.dll of the newer version, you may have a try
reinstalling IE.

Alternatetively, you could use a config file to force IE to load .NET 2.0.
To do this, create a config file called iexplore.exe.config in the same
folder as IExplore.exe and the config file will have the following contents.

<?xml version ="1.0"?>
<configuration>
<startup>
<supportedRuntime version="v2.0.50727" />
</startup>
</configuration>

Hope this helps.
If you have any concerns, please feel free to let me know.

Sincerely,
Linda Liu
Microsoft Online Community Support

==================================================
Get notification to my posts through email? Please refer to
http://msdn.microsoft.com/subscriptions/managednewsgroups/default.aspx#notif
ications.

Note: The MSDN Managed Newsgroup support offering is for non-urgent issues
where an initial response from the community or a Microsoft Support
Engineer within 1 business day is acceptable. Please note that each follow
up response may take approximately 2 business days as the support
professional working with you may need further investigation to reach the
most efficient resolution. The offering is not appropriate for situations
that require urgent, real-time or phone-based interactions or complex
project analysis and dump analysis issues. Issues of this nature are best
handled working with a dedicated Microsoft Support Engineer by contacting
Microsoft Customer Support Services (CSS) at
http://msdn.microsoft.com/subscriptions/support/default.aspx.
==================================================

This posting is provided "AS IS" with no warranties, and confers no rights.

Reply to this Message

IE running .NET 1.1 even though 2.0 installed

Free Magazines