Net Framework is a system component of Microsoft. Basically all products developed on the windows platform need to install the Net Framework. Except for the old system such as winxp, all windows systems come with Net Framework. Win2018 these high version server systems, you can skip this step, but many users generally first configure the environment on their own computers, most of them are win7 \ win8 systems, win7 and win8 comes with Net Framework version lower than 4.5, so you need Installed separately.
Net Framework download address: http://dotnet.microsoft.com/download/archives (Download version 4.6 or above, or you can search and download by yourself on Baidu)
The following uses Microsoft download as an example to explain the installation steps:
1. Open the download address and download the latest version directly
2. Click to jump to the download page
Click the installation package to download and save the interface.
Click the Save File button to download the installation package.
3. After downloading, open the save directory.
Click the installation package to exit the installation interface.
Installation is relatively simple. Follow the prompts to install. Installation takes a little time. If the following interface appears, the installation is successful.
Finally restart the computer framework to take effect.
Note: After installing a higher version on some win7 computers, the default .Net Framework 3.5 is used. You need to cancel it manually, as shown below.
If it is a win2012 or later system, iis checks whether asp.net4.5 is checked, as shown below:
After re-selecting the installation, you need to restart the server to take effect.