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Links between .NET Framework versions

I have an assembly written in C #, compiled with version 3.5 that uses WCF. This library must be used by another application written in vb.net by an external vendor compiled with version 2.0.

Is it possible?

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No, this is not possible, but not because of the difference in structure. This is not possible because your client does not have the assemblies required for WCF.

Actually, .NET 2.0 and .NET 3.5 use the same CLR. If you are compiling code for .NET 3.5, but are not using any of the new assemblies, then it should be possible for that code to use a .NET 2.0 application..NET 3.5 is just .NET 2.0 SP2 plus a few new assemblies.



In fact, .NET 3.0 is .NET 2.0 SP1 plus a few new assemblies .. NET 3.5 is .NET 2.0 SP2 plus .NET 3.0 SP1 plus new assemblies. All three use CLR.NET 2.0.

.NET 4.0 uses the new CLR and is a new version. .NET 4.0 code cannot run on a .NET 2.0 machine. However, there is a feature that allows the CLR to run .NET 2.0 and .NET 4.0 at the same time.

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No, you cannot do this. But you can do one thing. You can provide your other application with the dll

WCF code needed to run and any other dll you used in your application. I'm not sure about this, but you can try.



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