.NET 4.6 should usually be installed with Windows 10, but it may not be activated. You can also activate 3.5 if you need to. Starting with version 4, .NET provides an in-place update, i.e. It is no longer possible to install parallel versions 4.x. Support is ending soon for these interim versions.
Newer versions may appear on a Windows update (currently 4.6.1).
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