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.

Hello,

I have a .Net WPF Application in VS 2013. which contain 25 project.  i am using following dll as reference in one of them.

1. Microsoft.SqlServer.ConnectionInfo
2. Microsoft.SqlServer.Management.Sdk.Sfc
3. Microsoft.SqlServer.Smo

By using these dll, i was getting following 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.

after some google, i have added app.config file in Main  project (EXE Project )which contains following

<?xml version ="1.0"?><configuration><startup useLegacyV2RuntimeActivationPolicy="true"><supportedRuntime version="v4.0"/><requiredRuntime version="v4.0.20506"/></startup></configuration>

After adding this app.config file Error doesn't throw when i run from Visual studio but same error is throwing, when i run my application from Exe file.

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Prem Shah