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.NET 4.x Compatibility

.NET 4.5 was created as an in place upgrade.

This means, it will replace all the 4.0 binaries and therefore introduces not only new functionality, but also new behavior, which can break existing applications.

For this reason, there are many ways to upgrade the base functionality, but still make sure, that old 4.0/4.5/4.6) behavior in your application is retained.

Very important to not break existing 4.0 code is, that 4.5 and up will assume, that compatibility is needed. Upgrading a machine should therefore not create any issues…

Have a look at this very good posting to get a lot of important details:

https://blogs.msdn.microsoft.com/webdev/2012/11/19/all-about-httpruntime-targetframework/

Categories: .NET Framework
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