If you have to install a .NET Framework software on a computer not connected to Internet or in case you have to install on many computers, don't want to waste time to download several time the online installer , the best choice is run a standalone installer of .NET Framework.
You can download the software from Microsoft using following these link:
| Version | Download |
|---|---|
| .NET Framework 4.5 Setup | |
| .NET Framework 4.0 Setup | |
| .NET Framework 3.5 Setup | |
| .NET Framework 3.5 Setup Service Pack 1 | |
| .NET Framework 2.0 Setup |