Install the .NET 4.8 version on our Windows Core Server.

Run this to find the version of the currently installed.NET.

[Windows Server - Registry Entry]

CFFCS | CarrzSynEdit: | CMD (Windows Command Prompt) | L (Linux)

reg query "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Full" /v version

To install .NET on your Windows Core Server.
Change the Directory to the location on your server where you have the .NET file stored.

[divwrap=Windows Server - Registry Entry]

CFFCS | CarrzSynEdit: | CMD (Windows Command Prompt) | L (Linux)

C:\Users\YourUser> G:
G:\>cd apps

Get a list of files in the Directory.
G:\apps>dir

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Switch over to PowerShell.
G:\apps>Powershell

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Now, load the DOTNET file and install it.
PS G:\>./DOTNET-4.8.exe /q

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Once the installation is complete, the system will reboot, and then you can run the code above to find the version number of your newly installed .NET Framework.