Microsoft published a .NET Framework lifecycle FAQ update on October 20, 2018 to highlight changes in regards to the end of support for the company's .NET Framework 3.5 software product.
The main change is that Microsoft considers the .NET Framework 3.5 a standalone product as opposed to a component of the operating system. The change begins with Windows 10 version 1809 and Windows Server 2019.
Microsoft plans to support the .NET Framework 3.5 with 5 years of mainstream support and 5 years of extended support. In other words: the company will support the Microsoft .NET Framework 3.5 until October 2028 with security updates.
.NET Framework 3.5 SP1, beginning with Windows 10 version 1809 and Windows Server 2019, is a standalone product and receives 5 years of mainstream support followed by 5 years of extended support. For operating systems released prior to Windows 10 version 1809 and Windows Server 2019, .NET 3.5 SP1 remains a component of the Windows version on which it is installed.
Future operating system releases won't affect the support lifecycle of the .NET Framework 3.5.
Nothing changes for operating system versions prior to Windows 10 version 1809 and Windows Server 2019. The .Net Framework 3.5 is considered a component of the operating system and follows the same support cycle as the operating system itself (means support ends when the operating system reaches the end of the extended support phase).
Some programs do require the Microsoft .Net Framework 3.5 and not a newer version of the framework; this is for instance the case for programs that have not been updated for a while.
Windows 10 detects the missing framework automatically when a program is run on the system that requires a framework version that is not installed on the device and prompts for installation of the missing components.
Microsoft ended the support for the .NET Framework versions 4.0, 4.5, and 4.5.1 in 2015.
No changes were announced for the lifecycle policies for the .NET Framework 4.x which continue to be defined as a component of the operating system as opposed to a standalone component. The .NET Framework 4.x follows the support lifecycle of the Windows operating system version that is used.
The .NET Framework 3.5 will be supported for another ten years until October 2028 or, in the case of pre-Windows 10 version 1809 and Windows Server 2019 versions, until the operating system itself reaches end of support. (via Deskmodder)Advertisement
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