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.NET Forum / .NET Framework / Component Services / February 2004

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How to tell a .Net COM+ application which version of the Framework version to use?

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Craig Bryden - 30 Jan 2004 14:00 GMT
Hi

I created a COM+ application using .Net 1.0. I have subsequently installed
.Net 1.1 on my computer. It seem that the COM+ app has automatically started
running against 1.1, and is not working properly as a result.

I have found help on how to tell a .Net App(EXE) which Framework version to
use, but how do you tell a COM+ DLL which version to use???

Any help will be greatly appreciated!

Craig
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Slava Gurevich - 01 Feb 2004 16:34 GMT
http://blogs.msdn.com/florinlazar/archive/2003/12/04/41369.aspx

>Hi
>
[quoted text clipped - 8 lines]
>
>Craig
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Tomas Restrepo \(MVP\) - 01 Feb 2004 16:44 GMT
Craig,

> I created a COM+ application using .Net 1.0. I have subsequently installed
> .Net 1.1 on my computer. It seem that the COM+ app has automatically started
> running against 1.1, and is not working properly as a result.
>
> I have found help on how to tell a .Net App(EXE) which Framework version to
> use, but how do you tell a COM+ DLL which version to use???

It's interesting to note that COM+ *should* load the version of the .NET
framework that your assembly was compiled against by default, but
unfortunately, there are some bugs that can prevent that. There's one COM+
hotfix package that solves that for Win2k and another one for WinXP, though
I don't remember the exact numbers right now...

Signature

Tomas Restrepo
tomasr@mvps.org

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Timofey Kazakov - 01 Feb 2004 18:12 GMT
Hello, "Tomas Restrepo (MVP)"

> It's interesting to note that COM+ *should* load the version of the .NET
> framework that your assembly was compiled against by default
> I don't remember the exact numbers right now...

The COM+ (Dllhost.exe) Process Loads the Latest Version of .NET Runtime During Remote Client Activations
PSS ID Number: 328925
Reply to this Message
Timofey Kazakov - 01 Feb 2004 17:56 GMT
Hello, "Craig Bryden"

> I created a COM+ application using .Net 1.0. I have subsequently installed
> .Net 1.1 on my computer. It seem that the COM+ app has automatically started
> running against 1.1, and is not working properly as a result.
>
> I have found help on how to tell a .Net App(EXE) which Framework version to
> use, but how do you tell a COM+ DLL which version to use???

COM+ uses dllhost.exe as host process. You can create dllhost.exe.config and put it in system32 directory
<configuration>
  <startup>
     <requiredRuntime version="v1.0.3705"  safemode="true"/>
  </startup>
</configuration
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