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Hallie Wilcox
Hallie Wilcox

Microsoft Net Frame Work

Microsoft Net Frame Work >>>

Microsoft Net Frame Work

This version of the .NET Framework runs side-by-side with the .NET Framework 3.5 SP1 and earlier versions, but it performs an in-place update for the .NET Framework 4, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1 and 4.7.2.

When you target a particular version of .NET Framework, by default your application is built by using the reference assemblies that are included with that version's developer pack. In scenarios where the matching developer pack cannot be installed on the computer, you can alternatively build against reference assemblies distributed via a NuGet package.

SDK-style projects include this reference by default. For typical .NET Framework projects that were created with Visual Studio, the reference can be added with the NuGet Package Manager UI in Visual Studio. The package contains reference assemblies for many versions of .NET Framework. The version to be actually used is determined by the TargetFrameworkVersion or TargetFramework (TargetFrameworks) property, as already defined in the project file.

Using reference assemblies makes it possible to build projects that target unsupported versions of .NET Framework from the command line. However, you still can't load these projects in newer versions of Visual Studio. To continue building these apps in Visual Studio, the only workaround is to use an older version of Visual Studio.

You may see the following configuration dialog if you try to run an app that requires .NET Framework 3.5. Choose Install this feature to enable .NET Framework 3.5. This option requires an Internet connection.

The .NET Framework is created by Microsoft and provides an environment for running applications. There are different versions available. Many companies develop their apps to run using the .NET Framework, and these apps target a specific version. If you see this pop-up, you're trying to run an application that requires .NET Framework version 3.5, but that version is not installed on your system.

If you still can't resolve your installation issue or you don't have an Internet connection, you can try installing it using your Windows installation media. For more information, see Deploy .NET Framework 3.5 by using Deployment Image Servicing and Management (DISM). If you're using Windows 7, Windows 8.1, the latest release Windows 10, or Windows 11, but you don't have the installation media, create an up-to-date installation media here: Create installation media for Windows. Additional information about Windows 11 and Windows 10 Features on Demand: Features on Demand.

If you're not relying on Windows Update as the source for installing .NET Framework 3.5, you must ensure to strictly use sources from the same corresponding Windows operating system version. Using sources from a different Windows operating system version will either install a mismatched version of .NET Framework 3.5 or cause the installation to fail, leaving the system in an unsupported and unserviceable state.

The .NET Framework is required to run many applications on Windows. The instructions in this article should help you install the .NET Framework versions that you need. The .NET Framework 4.8 is the latest available version.

4.x versions of the .NET Framework can be used to run applications built for the .NET Framework 4.0 through that version. For example, .NET Framework 4.7 can be used to run applications built for the .NET Framework 4.0 through 4.7. The latest version (the .NET Framework 4.8) can be used to run applications built with all versions of the .NET Framework starting with 4.0.

Users can install and run multiple versions of .NET Framework on their computers. When you develop or deploy your app, you might need to know which .NET Framework versions are installed on the user's computer. The registry contains a list of the versions of .NET Framework installed on the computer.

A set of assemblies, which are collections of types and resources that provide the functionality for you


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