Oddly enough, this has been my, by far, most popular blog post the past 9 years I’ve been running this blog.
This blog post has been updated many times, and was initially written for Windows Server 2012, but is still applicable today.
It is very interesting that installing Dotnet 3.5 is basically the same as almost 10 years ago.
If you are, like most people, having issues with installing .NET Framework 3.5 on your server or client machine, read this blog post to get more clarity on this question.
This blog post focuses on installing .NET Framework 3.5 on Windows Server 2012, Windows Server 2016, Windows Server 2019, and Windows 10.
Where do I find the .NET Framework 3.5 installation status?
If you want to verify if .NET Framework 3.5 has been installed on your client, the easiest way is to do this via the Control Panel.
Open the Control Panel and go to Programs and Features.
Press Turn Windows features or off
Verify if .NET Framework 3.5 (Includes .NET 2.0 and 3.0) is enabled.
If you see the same as in the below screenshot, .NET Framework 3.5 is installed.
Install .NET Framework 3.5
This blog post describes how to install .NET Framework 3.5 using:
Unfortunately, installing Microsoft .NET Framework 3.5 is not as straightforward as you might think. Microsoft has a guide for installing .NET Framework 3.5, but it does not provide the full story.
Note: Findings suggest that the media used needs to match the Windows version you are trying to install on. So, if you are running Windows 10 1903, you will need to point to the Windows 10 1903 media.
How to Install .NET Framework 3.5 using DISM
Go to a command prompt and enter this command:
dism /online /enable-feature /featurename:NetFX3 /all /Source:d:sourcessxs /LimitAccess
Note: The source should be the Windows installation disc. In my case, the media was located on D:
Install .NET Framework 3.5 using Powershell
It is also possible to install .NET Framework 3.5 using Powershell. Use this command to accomplish this:
Add-WindowsCapability –Online -Name NetFx3~~~~ –Source D:\sourcessxs
Install .NET Framework 3.5 using the Server Manager
Go down to Specify an alternate source path and enter this in the path:
Enter the source path. This should be the Windows media path.
Install .NET Framework 3.5 using the offline installer
You can also install .NET Framework 3.5 using the Offline Installer: https://www.microsoft.com/en-us/download/confirmation.aspx?id=25150
Review installation of .NET Framework 3.5
Once you have followed one of the above 3 installation methods, verify the .NET Framework 3.5 Feature installation status using:
- The GUI
Review installation of .NET Framework 3.5 using the Server Manager
If you open Server Manager and open, Add Roles and Features, see the following for the .NET Framework 3.5 installation:
Review installation of .NET Framework 3.5 using Powershell
Use the below Powershell command to see if .NET Framework 3.5 is installed and with which subversions:
(Get-ItemProperty -Path "HKLM:SOFTWAREMicrosoftNET Framework SetupNDPv3.5").Version
Incredibly, this is still an issue and still my most popular blog post on this site.
For the past 7 years, since this blog post was first published, not much has changed on the GUI side.
The possibility to install .NET Framework 3.5 using Powershell is improved, but not much more.
ven though .NET Framework 3.5 is an old library, we are likely to see it as a prerequisite for the upcoming years.
When did you first encounter this issue and is it still applicable to you?
Please leave a comment below with your answer!
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