Windows 8 does not include .NET 3.5 (include .NET 2.0 and 3.0) by default. But if the user is upgrading from Windows 7 to Windows 8, .NET Framework 3.5 is fully enabled. The user can make sure this feature is enabled by check in Program and Features.
Lets get started;
The user still can enable this feature in offline mode if the user has Windows 8 DVD or ISO image.
Steps To Follow
The following are the steps to enable .NET Framework 3.5 (include .NET 2.0 and 3.0) feature in offline mode :
Step 1 :
Insert Windows 8 DVD or mount ISO image. The source of this feature can be found in folder E:\sources\sxs. (In this case E: the user’s drive letter on which the user has loaded Windows 8 Media.)
Step 2 :
Open Command Prompt.exe with Administrative Privileges.
Step 3 :
Run the following command
Dism.exe /online /enable-feature /featurename:NetFX3 /All /Source:E:\sources\sxs /LimitAccess
and hit Enter.
The process will run for about 5 minutes.
After completing the installation of .NET Framework 3.5 you can see that the feature is enabled.
*The above can be done when connected to internet