How does the Win10 system install the .NET Framework offline?

The first thing the new system installs is the installation of the 7788 operating environment, of which the .NET Framework is very important. When we install some software, we will prompt "Applications on your computer need to use the following Windows features: .NET Framework 3.5 (including .NET 2.0 and 3.0)". Figure:

If you choose “ download and install this feature. Windows will get the required files from the Windows update and complete the installation, then you will wait patiently, the download speed is very slow. So now Microsoft Chiefs teach you a way to install .NET Framework 3.5 locally without having to download it online.
[Win10 system offline installation .NET Framework tips]
1. First right click on the Win10 ISO file and select “Load”. As shown in the figure:

2.“This computer” will display the virtual drive "DVD drive (L:)", and write down the drive letter < L: & rdquo;.
3. Then run the command prompt as an administrator and enter the following command in the "Admin: Command Prompt" window:
dism.exe /online /enable-feature /featurename:netfx3 /Source :L:sourcessxs
Note: The drive letter L should be changed to your actual virtual drive letter!

4. Enter, wait for deployment, progress 100%, prompt "Operation completed successfully ”. This completes the Win10 installation of .NET Framework 3.5.
5. Verification: You can open the control panel and go to “Program", click “ "Programs and Functions" to enable or disable Windows features. Figure:

6. Then in the "Windows Features" window that opens, view ".NET Framework 3.5 (including .NET 2.0 and 3.0)", if it is already selected, it will be installed. success. As shown in the figure:

Some users may think, I select "<;NET Framework 3.5 (including .NET 2.0 and 3.0)" directly in the "Windows Features" window, and then click “OK” Can you install it? Why do you have to pay for the work ahead? In fact, you still need to install and install online through Windows Update, and the speed is of course very slow.