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Is .net framework 2.0 required if 3.5 is installed?

I'm wondering if .net framework 3.5 is installed, is .net framework 2.0 still required to run .net 2.0 applications? Thanks.

.Net 3.5 is really .Net 2.0 plus some extras. You can't install 3.5 unless .Net 2.0 is also there.

.NET 3.5在.NET 2.0之上运行,因此它们都可以使用.NET 3.5。

I beg to differ. I'm trying to install Email2DB 3.0 on a Windows Server 2003 machine that has .Net 3.5 and the installation errors out saying it can't find .Net 2.0. Tech support's only reply to my issue is "You have to have .Net 2.0 installed because it has certain components required." With that said, however, their manual says with Server 2008 or 2012 it requires .Net 3.5 so I'm sure the issue is with the software being installed.

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