Which .Net version does windows 10 have built-in? [closed]

Here is a link to Microsoft Article that answers "What version of the .NET Framework is included in what version of the OS?"

Windows 10 (all editions) includes the .NET Framework 4.6 as an OS component, and it is installed by default. It also includes the .NET Framework 3.5 SP1 as an OS component that is not installed by default. The .NET Framework 3.5 SP1 can be added or removed via the Programs and Features control panel.

Details from the link:

• Windows 10 1507 (all editions) includes the .NET Framework 4.6.0
• Windows 10 1511 November 2015 Update (all editions) includes the .NET Framework 4.6.1
• Windows 10 1607 Anniversary Update (all editions) includes the .NET Framework 4.6.2
• Windows 10 1703 Creators Update (all editions) includes the .NET Framework 4.7
• Windows 10 1709 Fall 2017 Creators Update (all editions) includes the .NET Framework 4.7.1
• Windows 10 1803 April 2018 Update (all editions) includes the .NET Framework 4.7.2
• Windows 10 1903 May 2019 Update (all editions) includes the .NET Framework 4.8

.NET 4.6 should normally be installed with Windows 10, but it might not be activated. You can also activate 3.5 if you need to. From version 4 onwards, .NET delivers in-place updates, i.e. it is no longer possible to have parallel versions of 4.x installed. Support ends soon for these intermediate versions.

Newer versions might come per Windows update (currently 4.6.1).