The .NET Framework for Users
If you do not develop .NET Framework applications, but you use them, you do not need 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, because an application you use may depend on a specific version and may break if that version is removed. 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.