About Net framework 3.5
We like to start an application that we just installed on Windows Server. After starting the application, the Windows Features screen shows up that .NET Framework 3.5 (includes .NET 2.0 and 3.0) feature couldn’t be installed. We like to enable .NET Framework 3.5 on Windows Server to run the application. In this article, you will learn how to install .NET Framework 3.5 on Windows Server.Table of contentsThe following feature couldn’t be installed: .NET Framework 3.5 (includes .NET 2.0 and 3.0)How to install .NET Framework 3.5?Check .NET Framework 3.5 with PowerShellInstall .NET Framework 3.5 with PowerShellVerify .NET Framework 3.5 with PowerShellInstall .NET Framework 3.5 with Server ManagerVerify .NET Framework 3.5 with Server ManagerConclusionThe following feature couldn’t be installed: .NET Framework 3.5 (includes .NET 2.0 and 3.0)After opening the application, the Windows Features screen shows up with the message:The following feature couldn’t be installed: NET Framework 3.5 (includes .NET 2.0 and 3.0). Windows Server roles and features cannot be automatically installed or uninstalled via the Windows Features Control Panel. To Install Windows Server roles and features, start Server Manager, or use the Server Manager cmdlets for Windows PowerShell.There are a couple of ways to install .NET Framework on Windows Server. In this article, we are going to use:Windows PowerShellAdd Roles and Features in Server ManagerCheck .NET Framework 3.5 with PowerShellFind .NET Framework 3.5 on Windows Server with PowerShell. Run PowerShell as administrator. Use one of the cmdlets.PS C:\> Get-WindowsFeature -Name "NET-Framework-Core"Display Name Name Install State------------ ---- ------------- [ ] .NET Framework 3.5 (includes .NET 2.0 and 3.0) NET-Framework-Core RemovedPS C:\> (Get-ItemProperty -Path "HKLM:SOFTWARE\Microsoft\NET Framework Setup\NDP\v3.5").VersionGet-ItemProperty : Cannot find path 'HKLM:\SOFTWARE\Microsoft\NET Framework Setup\NDP\v3.5' because it does not exist.At line:1 char:2+ (Get-ItemProperty -Path "HKLM:SOFTWARE\Microsoft\NET Framework Setup\ ...+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + CategoryInfo : ObjectNotFound: (HKLM:\SOFTWARE\... Setup\NDP\v3.5:String) [Get-ItemProperty], ItemNotFoundException + FullyQualifiedErrorId : PathNotFound,Microsoft.PowerShell.Commands.GetItemPropertyCommandThe first cmdlet output shows that the install state is Removed. The second cmdlet output shows that it can’t find the registry path because it does not exist.Now that we can see that the .NET Framework version is not installed on the system, we will install it in the next step.Install .NET Framework 3.5 with PowerShellIf there is an internet on the Windows Server and you can retrieve Windows Updates from Microsoft, you can install .NET Framework 3.5 with PowerShell.PS C:\> Install-WindowsFeature NET-Framework-CoreSuccess Restart Needed Exit Code Feature Result------- -------------- --------- --------------True No Success {.NET Framework 3.5 (includes .NET 2.0 and...The column Exit code with value Success means that it’s installed successfully.Verify .NET Framework 3.5 with PowerShellVerify that .NET Framework 3.5 is installed on Windows Server with the cmdlets.PS C:\> Get-WindowsFeature -Name "NET-Framework-Core"Display Name Name Install State------------ ---- ------------- [X] .NET Framework 3.5 (includes .NET 2.0 and 3.0) NET-Framework-Core InstalledPS C:\> (Get-ItemProperty -Path "HKLM:SOFTWARE\Microsoft\NET Framework Setup\NDP\v3.5").Version3.5.30729.4926Install .NET Framework 3.5 with Server ManagerStart Server Manager and click Manage. Click Add Roles and Features in the menu to start the wizard.Click Next.Again, click on Next.One more time on Next.Check the checkbox .NET Framework 3.5 (includes .NET 2.0 and 3.0). Click Next.Click Install to confirm the installation.Installation succeeded.
Key features of the Net framework 3.5 that are enabled through these drivers include:
- Enable .NET Framework 2.0 and .NET Framework 3.5 in
- Enable .NET Framework 2.0 and .NET Framework 3.5
- Installing .NET Framework 3.5 requires .NET Framework 3.5
- It is possible to target .NET framework 3.5 or .NET framework 3.5
- Microsoft .NET Framework 3.5 SP 1 and .NET Framework 3.5
- .Net Framework 3.5 and .Net Framework 3.5 SP1 have - Stack
- .Net Framework 3.5 and .Net Framework 3.5 SP1 have same
INTRODUCTION This article contains clarification on the support life cycle for the .NET Framework 3.5, the .NET Framework 3.0, and the .NET Framework 2.0. Background The .NET Framework 3.5, the .NET Framework 3.0, and the .NET Framework 2.0 were historically released as individual products on platforms in versions of Windows earlier than Windows 7 and Windows Server 2008 R2. Each of these product versions are really layers of a feature stack. Internally, each layer contains mutually-exclusive components. So components in the .NET Framework 3.0 build on top of the .NET Framework 2.0, and components in the .NET Framework 3.5 build on top of both the .NET Framework 2.0 and the .NET Framework 3.0. This is shown in the following image: One by-product of this architecture is that the .NET Framework 3.5 cannot function without the .NET Framework 2.0 and the .NET Framework 3.0 because there is no common language runtime (CLR) in the .NET Framework 3.5 layer. Therefore, when the .NET Framework 3.5 product is installed, this also installs the .NET Framework 2.0 Service Pack 1 (SP1) and the .NET Framework 3.0 SP1 products. Similarly, when the .NET Framework 3.5 SP1 product is installed, this also installs the .NET Framework 2.0 SP2 and .NET Framework 3.0 SP2 products. Customers who are running Windows XP or Windows Server 2003 can view these individual versions together with the corresponding updates under the Add or Remove Programs item in Control Panel:On Windows Vista SP2 and Windows Server 2008 SP2, the .NET Framework 2.0 SP2 and the .NET Framework 3.0 SP2 are built into the operating system. Similarly, on Windows Vista SP1 and Windows Server 2008, the .NET Framework 2.0 SP1 and the .NET Framework 3.0 SP1 are built into the operating system. Therefore, customers only see the .NET Framework 3.5 under the Programs and Features item, as shown in the following image: Support life cycle implications Because the .NET Framework 3.5, the .NET Framework 3.0, and the .NET Framework 2.0 were released as independent product versions, each of these products have independent support lifecycles. As discussed earlier in this article, the .NET Framework 3.5 cannot function without the .NET Framework 2.0 and the .NET Framework 3.0. In many cases, addressing functional issues or securing customers from security vulnerabilities for the .NET Framework 3.5 requires addressing issues in each of the three product layers. This can result in scenarios where the .NET Framework 3.5
