The .NET Framework is included with Windows 8.1, and the .NET Framework 4.5.1 is installed by default during OS installation. If the program requires .NET Framework 3.5 support, the related features will be automatically enabled.
Note:
1. .NET Framework 3.5 supports both .NET Framework 2.0/3.0/3.5 build applications.
2. Before installing the Windows language pack, you need to install .NET Framework 3.5 first.
3. Windows CardSpace is no longer available in .NET Framework 3.5.
First, enable .NET Framework 3.5 on demand
If the program requires .NET Framework 3.5 support, the related functions will be automatically enabled.
Second, the control panel enables .NET Framework 3.5
Open the control panel, click “ Programs & rdquo;, select “ enable or disable Windows features & rdquo;, select Microsoft .NET Framework 3.5 is fine.
Note: Two sub-items apply to developers who need WCF scripts and handler mappings, and no need for general users to choose.
Both of the above installation methods require an Internet connection. If you do not want to use an Internet connection, you can use the DISM (Deployment Image Service and Management Tools) to deploy the .NET Framework 3.5 offline
1. Win +X Select command prompt (admin mode).
2. Load the installation image. In this example, the installation image is loaded to the d drive. The installation source is located at d:\\sources\\sxs. Enter the following command:
DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /LimitAccess /Source:d:\\sources\\sxs
/Online Specifies to enable related features in the running operating system
/Enable-Feature /FeatureName:NetFx3 Specify to enable .NET framework 3.5
/All Enable all parent functions of .NET framework 3.5
/LimitAccess Block DISM from Windows Update connection
/Source Specifies that you need to enable the function. Location
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