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.net.net-framework-version

.NET upgrade to a server with lower version

We are upgrading a project from .NET-Framework Version 3.0 to 4.5. The upgrade of the code was successful and now we plan to publish the app to our servers.

Our concern:

The server has only .NET-Framework Version 4.0-Version installed and not Version 4.5.

Will this be an issue?

Solution

  • Short answer:

    This will be definitively a problem.

    The .NET-Runtime Version 4.0 cannot execute .NET 4.5-Code.

    You should be aware of that the support-timeframe for .NET 4.0 and .NET 4.5 will end on January 12, 2016. Consider to upgrade your code and your server at least to .NET 4.5.2.