Installing DotNet 3.5 on Windows with Restricted Internet Access

# Set Windows Source files
# Assuming that a Windows ISO / DVD Rom have been mounted as F:\ volume
$windowsSources='F:\sources\sxs'
dism /online /enable-feature /featurename:NetFX3 /All /Source:$windowsSources /LimitAccess

# Sample output
# [TESTWINDOWS]: PS f:\> dism /online /enable-feature /featurename:NetFX3 /all /Source:$windowsSources /LimitAccess

# Deployment Image Servicing and Management tool
# Version: 10.0.20348.681
# Image Version: 10.0.20348.707
# Enabling feature(s)
# [===========================61.0%===                       ]
# [==========================100.0%==========================]
# The operation completed successfully.