Can we enable .Net 3.5 Windows 2019 server along with . Net 4.7

Question

Hi,

Will installing .NET Framework v.3.5 alongside newer version(s) present on Windows 2019 server affect the correct working of SQL Server 2016/2017/2019 (that are already installed) in any way?

We are installing .NET Framework v.3.5 for installing SQL server 2014 on the same Windows 2019 server .

Thanks,
Ravi Shankar

Answer 1

Hi,

Can we enable .Net 3.5 Windows 2019 server along with . Net 4.7

Yes. These two versions are separated.

Note!!!

Not all versions are independent. For example, you cannot run versions 2.0, 3.0, and 3.5 side by side since these are all built with the same version of the CLR (CLR 2.0).

Only from .NET Framework 4 Microsoft ended this layering approach and you can use multiple versions side-by-side. So, you can have one version out of 2.0, 3.0, or 3.5 and multiple newer versions

https://learn.microsoft.com/en-us/dotnet/framework/migration-guide/versions-and-dependencies#remarks-for-older-versions

Important! I highly recommend to check the following document regarding the .NET Framework requirements for various versions of SQL Server

https://learn.microsoft.com/en-us/troubleshoot/sql/install/understanding-dotnet-framework-requirements

Answer 2

The .NET frameworks versions are independent installation and you can have several different versions side-by-side on a machine without any issue.

Answer 3

Thank you all for confirmation.