Mixed mode assembly is built against version 'v2.0.50727' of the runtime and cannot be loaded in the 4.0 runtime without additional configuration information.

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i got the folder dotnet1 is missing i create it and put in it dll file i got that error

Mixed mode assembly is built against version 'v2.0.50727' of the runtime and cannot be loaded in the 4.0 runtime without additional configuration information.

Posted 24-Aug-15 4:16am

ÃHmed Élkady

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Sergey Alexandrovich Kryukov 24-Aug-15 10:27am

You could just do your Web search.
—SA

ÃHmed Élkady 24-Aug-15 10:37am

i search but didn,t find solution

ZurdoDev 24-Aug-15 10:31am

Make sure you app pool matches the actual code.

ÃHmed Élkady 24-Aug-15 10:33am

xml version="1.0"
configuration
configsections
configsections
connectionstrings
add name="WindowsFormsApplication1.Properties.Settings.inventoryConnectionString" connectionstring="Data Source=(local);Initial Catalog=inventory;Integrated Security=True" providername="System.Data.SqlClient"
add connectionstrings
startup uselegacyv2runtimeactivationpolicy="true"
supportedruntime version="v4.0" sku=".NETFramework,Version=v4.0"
supportedruntime
startup
configuration

ÃHmed Élkady 24-Aug-15 10:38am

how pls help

ZurdoDev 24-Aug-15 10:43am

It looks like your code is targeted for .net 2.0. So, in the app pool in IIS, change the framework to 2.0

ÃHmed Élkady 24-Aug-15 10:45am

its win form and the runtime and all ting set to .net framework 4.0

ZurdoDev 24-Aug-15 10:46am

No, everything is not set to 4.0 or else you wouldn't get that error. Something is still at 2.0.

ÃHmed Élkady 24-Aug-15 11:26am

How i would change all to 4

ZurdoDev 24-Aug-15 11:31am

I suggest going through the links posted in Solution 1.

ÃHmed Élkady 25-Aug-15 8:22am

i add uselegacyv2runtimeactivationpolicy="true">
supportedruntime version="v4.0" sku=".NETFramework,Version=v4.0" supportedruntime
still same problem

1 solution

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Sergey Alexandrovich Kryukov · Answer 1 · 2015-08-24T04:26:00

Solution 1

Please see:
http://stackoverflow.com/questions/2455654/what-additional-configuration-is-necessary-to-reference-a-net-2-0-mixed-mode[^],
http://stackoverflow.com/questions/14508627/mixed-mode-assembly-is-built-against-version-2-0-50727-of-the-runtime-and-cann[^].

—SA

Posted 24-Aug-15 4:26am

Sergey Alexandrovich Kryukov

Comments

ÃHmed Élkady 24-Aug-15 10:33am

--?xml version="1.0"?--
configuration
configsections
configsections
connectionstrings
add name="WindowsFormsApplication1.Properties.Settings.inventoryConnectionString" connectionstring="Data Source=(local);Initial Catalog=inventory;Integrated Security=True" providername="System.Data.SqlClient">
add connectionstring
startup uselegacyv2runtimeactivationpolicy="true"
supportedruntime version="v4.0" sku=".NETFramework,Version=v4.0"
supportedruntime startup
configuration

Sergey Alexandrovich Kryukov 24-Aug-15 10:44am

Take a look at your own post; it shows nothing.
—SA

ÃHmed Élkady 24-Aug-15 10:46am

??

Sergey Alexandrovich Kryukov 24-Aug-15 12:06pm

What '??'? Did you look at your comment after you post it. Please fix it.
—SA

ÃHmed Élkady 25-Aug-15 8:20am

i add uselegacyv2runtimeactivationpolicy="true">
supportedruntime version="v4.0" sku=".NETFramework,Version=v4.0" supportedruntime
still same problem

Sergey Alexandrovich Kryukov 25-Aug-15 8:53am

Please remove your first comment, or make it readable.
—SA

ÃHmed Élkady 25-Aug-15 9:15am

Now its visible i remove <> signs to be visible

Sergey Alexandrovich Kryukov 25-Aug-15 9:33am

But now it's not XML as it was. Is it really a problem to show XML in HTML?
—SA

ÃHmed Élkady 25-Aug-15 9:40am

i can but the <> sign because its come invisible but now pls how i can solve it

Sergey Alexandrovich Kryukov 25-Aug-15 9:45am

(Sigh...)

ÃHmed Élkady 25-Aug-15 9:45am

In reply cant but xml