Se eu tenho o .Net framework 4.5, eu continuo tendo que instalar o .Net Framework antes de instalar o Unity 10?

Problema
Se o ‘.Net Framework’ já está instalado no Windows Server 2008, eu preciso instalar o ‘.Net Framework’ antes de instalar o Unity?

Linha de Produto
EcoStruxure Control Expert (antigo Unity Pro)

Ambiente
Unity Pro v10

Resolução
O ‘ReadMe’ do o Unity menciona que o .Net 3.5 é requirido. Se o .Net Framework 4.5 já está instalado no PC, e necessário instalar o ‘.Net Framework 3.5’?
A resposta e ‘Sim’.
O ‘.Net Framework 3.5’ não tem a mesma biblioteca ‘.Net Framework 4.5’, Unity 10 foi desenvolvido utilizando as bibliotecas do ‘.Net Framework 3.5’
O seguinte document foi extraido de: 'https://msdn.microsoft.com/en-us/library/hh425099.aspx'.
The .NET Framework for users

If you do not develop .NET Framework applications, but you use them, you are not required to have any specific
knowledge about the .NET Framework or its operation. For the most part, the .NET Framework is completely
transparent to users.
If you are using the Windows operating system, the .NET Framework may already be installed on your computer.
In addition, if you install an application that requires the .NET Framework, the application's setup program might
install a specific version
of the .NET Framework on your computer. In some cases, you may see a dialog box that asks you to install the
.NET Framework. If you have just tried to run an application when this dialog box appears and if your computer
has Internet access, you can go to a webpage that lets you install the missing version of the .NET Framework.
In general, you should not uninstall any versions of the .NET Framework that are installed on your computer.
There are two
reasons for this:
· If an application that you use depends on a specific version of the .NET Framework, that application may
break if that version is removed.
· Some versions of the .NET Framework are in-place updates to earlier versions. For example, the .NET
Framework 3.5 is an in-place update to version 2.0, and the .NET Framework 4.6 is an in-place update
to versions 4, 4.5, 4.5.1, and 4.5.2. For more information, see .NET Framework Versions and Dependencies.
If you do choose to remove the .NET Framework, always use Programs and Features from Control Panel to uninstall
it. Never remove a version of the .NET Framework manually.
Note that multiple versions of the .NET Framework can be loaded on a single computer at the same time. This means
that you do not have to uninstall previous versions in order to install a later version.

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