.NET Framework versions and dependencies

Each version of .NET Framework contains the common language runtime (CLR), the base class libraries, and other managed libraries. This article describes the key features of .NET Framework by version, provides information about the underlying CLR versions and associated development environments, and identifies the versions that are installed by the Windows operating system (OS).

Each new version of .NET Framework adds new features but retains features from previous versions.

The CLR is identified by its own version number. The .NET Framework version number is incremented at each release, but the CLR version is not always incremented. For example, .NET Framework 4, 4.5, and later releases include CLR 4, but .NET Framework 2.0, 3.0, and 3.5 include CLR 2.0. (There was no version 3 of the CLR.)

Tip

Version information

The tables that follow summarize .NET Framework version history and correlate each version with Visual Studio, Windows, and Windows Server. Visual Studio supports multi-targeting, so you're not limited to the version of .NET Framework that's listed.

  • The check mark icon ✔️ denotes OS versions on which .NET Framework is installed but must be enabled in Control Panel (for Windows) or through the Server Manager (for Windows Server).
  • The plus sign icon ➕ denotes OS versions on which .NET Framework doesn't come installed but can be installed.
.NET Framework 4.8 .NET Framework 4.7.2 .NET Framework 4.7.1 .NET Framework 4.7
.NET Framework 4.6.2 .NET Framework 4.6.1 .NET Framework 4.6 .NET Framework 4.5.2
.NET Framework 4.5.1 .NET Framework 4.5 .NET Framework 4 .NET Framework 3.5
.NET Framework 3.0 .NET Framework 2.0 .NET Framework 1.1 .NET Framework 1.0

.NET Framework 4.8

CLR version 4
Windows versions ✔️ 10 May 2019 Update
➕ 10 October 2018 Update (Version 1809)
➕ 10 April 2018 Update (Version 1803)
➕ 10 Fall Creators Update (Version 1709)
➕ 10 Creators Update (Version 1703)
➕ 10 Anniversary Update (Version 1607)
➕ 8.1
➕7
Windows Server versions ➕ Windows Server 2019
➕ Windows Server, version 1809
➕ Windows Server, version 1803
➕ 2016
➕ 2012 R2
➕ 2012
➕ 2008 R2 SP1
To determine installed .NET version Use Release DWORD:
- 528040 (Windows 10 May 2019 Update)
- 528049 (all other OS versions)
(See instructions)

.NET Framework 4.7.2

CLR version 4
Included in Visual Studio version 20191
Windows versions ✔️ 10 October 2018 Update (Version 1809)
✔️ 10 April 2018 Update (Version 1803)
➕ 10 Fall Creators Update (Version 1709)
➕ 10 Creators Update (Version 1703)
➕ 10 Anniversary Update (Version 1607)
➕ 8.1
➕7
Windows Server versions ✔️ Windows Server 2019
✔️ Windows Server, version 1809
✔️ Windows Server, version 1803
➕ Windows Server, version 1709
➕ 2016
➕ 2012 R2
➕ 2012
➕ 2008 R2 SP1
To determine installed .NET version Use Release DWORD:
- 461814 (Windows 10 October 2018 Update)
- 461808 (Windows 10 April 2018 Update and Windows Server, version 1803)
- 461814 (all other OS versions)
(See instructions)

1 Requires installing the .NET desktop development, ASP.NET and web development, Azure development, Office/SharePoint development, Mobile development with .NET, or .NET Core cross-platform development workloads.

.NET Framework 4.7.1

CLR version 4
Windows versions ✔️ 10 Fall Creators Update (Version 1709)
➕ 10 Creators Update (Version 1703)
➕ 10 Anniversary Update (Version 1607)
➕ 8.1
➕7
Windows Server versions ➕ Windows Server, version 1803
✔️ Windows Server, version 1709
➕ 2016
➕ 2012 R2
➕ 2012
➕ 2008 R2 SP1
To determine installed .NET version Use Release DWORD:
- 461308 (Windows 10 Creators Update and Windows Server, version 1709)
- 461310 (all other OS versions)
(See instructions)

.NET Framework 4.7

CLR version 4
Windows versions ✔️ 10 Creators Update (Version 1703)
➕ 10 Anniversary Update (Version 1607)
➕ 8.1
➕7
Windows Server versions ➕ 2016
➕ 2012 R2
➕ 2012
➕ 2008 R2 SP1
To determine installed .NET version Use Release DWORD:
- 460798 (Windows 10 Creators Update)
- 460805 (all other OS versions)
(See instructions)

.NET Framework 4.6.2

CLR version 4
Windows versions ✔️ 10 Anniversary Update (Version 1607)
➕ 10 November Update (Version 1511)
➕ 10
➕ 8.1
➕ 7
Windows Server versions ✔️ 2016

➕ 2012 R2
➕ 2012
➕ 2008 R2 SP1
To determine installed .NET version Use Release DWORD:

- 394802 (Windows 10 Anniversary Update and Windows Server 2016)
- 394806 (all other OS versions)

(See instructions)

.NET Framework 4.6.1

CLR version 4
Included in Visual Studio version 20171
Windows versions ✔️ 10 November Update (Version 1511)
➕ 10
➕ 8.1
➕ 8
➕ 7
Windows Server versions ➕ 2012 R2
➕ 2012
➕ 2008 R2 SP1
To determine installed .NET version Use Release DWORD:

- 394254 (Windows 10 November Update)
- 394271 (all other OS versions)

(See instructions)

1 Requires installing the .NET desktop development, ASP.NET and web development, Azure development, Office/SharePoint development, Mobile development with .NET, or .NET Core cross-platform development workloads.

.NET Framework 4.6

CLR version 4
Included in Visual Studio version 2015
Windows versions ✔️ 10

➕ 8.1
➕ 8
➕ 7
➕ Vista
Windows Server versions ➕ 2012 R2
➕ 2012
➕ 2008 R2 SP1
➕ 2008 SP2
To determine installed .NET version Use Release DWORD:

- 393295 (Windows 10)
- 393297 (all other OS versions)

(See instructions)

.NET Framework 4.5.2

CLR version 4
Windows versions ➕ 8.1
➕ 8
➕ 7
➕ Vista
Windows Server versions ➕ 2012 R2
➕ 2012
➕ 2008 R2 SP1
➕ 2008 SP2
To determine installed .NET version Use Release DWORD 379893

(See instructions)

.NET Framework 4.5.1

CLR version 4
Included in Visual Studio version 2013
Windows versions ✔️ 8.1

➕ 8
➕ 7
➕ Vista
Windows Server versions ✔️ 2012 R2

➕ 2012
➕ 2008 R2 SP1
➕ 2008 SP2
To determine installed .NET version Use Release DWORD:

- 378675 (Windows 8.1)
- 378758 (all other)

(See instructions)

.NET Framework 4.5

CLR version 4
Included in Visual Studio version 2012
Windows versions ✔️ 8
➕ 7
➕ Vista
Windows Server versions ✔️ 2012
➕ 2008 R2 SP1
➕ 2008 SP2
To determine installed .NET version Use Release DWORD 378389

(See instructions)

.NET Framework 4

New features

CLR version 4
Included in Visual Studio version 2010
Windows versions ➕ 7
➕ Vista
Windows Server versions ➕ 2008 R2 SP1
➕ 2008 SP2
➕ 2003
To determine installed .NET version See instructions

.NET Framework 3.5

New features:

  • LINQ
  • Expression trees
  • Improved ASP.NET support for AJAX development
  • HashSet collections
  • DateTimeOffset
  • WCF and WF integration
  • Peer-to-Peer networking
  • Add-ins for extensibility
CLR version 2.0
Included in Visual Studio version 2008
Windows versions ✔️ 10*
✔️ 8.1*
✔️ 8*
✔️ 7

➕ Vista
Windows Server versions ➕ Windows Server, version 1803*
➕ Windows Server, version 1709*
➕ 2016*
➕ 2012 R2*
➕ 2012*

✔️2008 R2 SP1*

➕ 2008 SP2
➕ 2003
To determine installed .NET version See instructions

.NET Framework 3.0

New features:

  • Windows Presentation Foundation
  • Windows Communication Foundation
  • Windows Workflow Foundation
  • Windows CardSpace
CLR version 2.0
Windows versions ✔️ Vista
Windows Server versions ✔️ 2008 R2 SP1*
✔️ 2008 SP2*

➕ 2003
To determine installed .NET version See instructions.

.NET Framework 2.0

New features:

  • Generics
  • Debugger edit and continue
  • Improved scalability and performance
  • ClickOnce deployment
  • In ASP.NET 2.0, new controls and support for a broad array of browsers
  • 64-bit support
CLR version 2.0
Included in Visual Studio version 2005
Windows versions N/A
Windows Server versions ✔️ 2008 R2 SP1
✔️ 2008 SP2
✔️ 200
To determine installed .NET version See instructions

.NET Framework 1.1

New features:

  • ASP.NET mobile controls
  • Side-by-side execution
  • IPv6 support
CLR version 1.1
Included in Visual Studio version 2003
Windows versions N/A
Windows Server versions ✔️ 2003
To determine installed .NET version See instructions

.NET Framework 1.0

CLR version 1.0
Included in Visual Studio version Visual Studio .NET
Windows versions N/A
Windows Server versions N/A
To determine installed .NET version See instructions

Note

  • .NET Framework must be enabled on this operating system through Control Panel (for Windows) or the Server Manager (for Windows Server).
  • In general, you should not uninstall any versions of .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. You can load multiple versions of .NET Framework on a single computer at the same time. This means that you can install .NET Framework without having to uninstall previous versions. For more information, see Getting Started.

Remarks for version 4.5 and later

.NET Framework 4.5 is an in-place update that replaces .NET Framework 4 on your computer, and similarly, .NET Framework 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, and 4.8 are in-place updates to .NET Framework 4.5. In-place update means that they use the same runtime version, but the assembly versions are updated and include new types and members. After you install one of these updates, your .NET Framework 4, .NET Framework 4.5, .NET Framework 4.6, or .NET Framework 4.7 apps should continue to run without requiring recompilation. However, the reverse is not true. We do not recommend running apps that target a later version of .NET Framework on an earlier version. For example, we do not recommend that you run an app the targets .NET Framework 4.6 on .NET Framework 4.5.

The following guidelines apply:

  • In Visual Studio, you can choose .NET Framework 4.5 as the target framework for a project (this sets the GetReferenceAssemblyPaths.TargetFrameworkMoniker property) to compile the project as a .NET Framework 4.5 assembly or executable. This assembly or executable can then be used on any computer that has the .NET Framework 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, or 4.8 installed.

  • In Visual Studio, you can choose .NET Framework 4.5.1 as the target framework for a project to compile it as a .NET Framework 4.5.1 assembly or executable. Only run this assembly or executable on computers that have .NET Framework 4.5.1 or later installed. An executable that targets .NET Framework 4.5.1 will be blocked from running on a computer that only has an earlier version of .NET Framework, such as .NET Framework 4.5, installed. The user will be prompted to install .NET Framework 4.5.1. In addition, .NET Framework 4.5.1 assemblies should not be called from an app that targets an earlier version of .NET Framework, such as .NET Framework 4.5.

    Note

    .NET Framework 4.5.1 and .NET Framework 4.5 are used here only as examples. The principle described applies to any app that targets a later version of .NET Framework than the one installed on the system on which it's running.

Some changes in .NET Framework may require changes to your app code; see Application Compatibility before you run your existing apps with .NET Framework 4.5 or later versions. For more information about installing the current version, see Install the .NET Framework for developers. For information about support for the .NET Framework, see .NET Framework official support policy on the .NET website.

Remarks for older versions

.NET Framework versions 2.0, 3.0, and 3.5 are built with the same version of the CLR (CLR 2.0). These versions represent successive layers of a single installation. Each version is built incrementally on top of the earlier versions. It's not possible to run versions 2.0, 3.0, and 3.5 side by side on a computer. When you install version 3.5, you get the 2.0 and 3.0 layers automatically, and apps that were built for versions 2.0, 3.0, and 3.5 can all run on version 3.5. However, .NET Framework 4 ends this layering approach, and it and later releases (.NET Framework 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, and 4.8) also represent successive layers of a single installation. Starting with .NET Framework 4, you can use in-process, side by side hosting to run multiple versions of the CLR in a single process. For more information, see Assemblies and Side-by-Side Execution.

In addition, if your app targets version 2.0, 3.0, or 3.5, your users may be required to enable .NET Framework 3.5 on a Windows 8, Windows 8.1, or Windows 10 computer before they can run your app. For more information, see Install the .NET Framework 3.5 on Windows 10, Windows 8.1, and Windows 8.

Next steps

See also