Problem while uninstalling the setup

I created aplication in .net framework 3.5 & created setup project in .net framework 4.0. I installed it on the machine which is having vs2010. But while uninstalling setup , it is trowing following exception-

Error 1001. An exception occurred while uninstalling. This exception will be ignored & the uninstall will continuw. However , the application might not be fully uninstalled after the uninstall is complete. -> Mixed mode assembly is built against version 'v2.0.50727' of the runtime and cannot be loaded in the 4.0 runtime without additional configration informati开发者_JAVA百科on.

I added some .net 2.0 dll in the setup as well as .net 4.0 dll too. Is it creating problem? But i don't think because i'm running it on the higher version. Then how it is throwing error?

How to solve this?

thanks

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You can solve that by adding a .config file containing the following to your project allowing mixed mode assembly

this is the "additional configration information" it wants:

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <startup useLegacyV2RuntimeActivationPolicy="true">
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/>
  </startup>
</configuration>