Microsoft does not recommend downloading offline installers from third-party mirror sites. Always use the official Microsoft sources.
The .NET Framework 3.5 is a cumulative build that . This means that when you install or enable version 3.5, you automatically provide the necessary files for applications that require the older 2.0 and 3.0 versions. Key Inclusion Details net framework 35 includes net 20 and 30 download link
Modern versions of Windows come with .NET 3.5 built into the operating system image but disabled by default. for Windows 10/11 if possible, as it can cause system file conflicts. This means that when you install or enable version 3
Unlike newer versions of the framework (like 4.x), which are "in-place" updates that replace the previous version, .NET Framework 3.5 is a . Unlike newer versions of the framework (like 4
They are designed to run side by side. .NET 4.x uses a different CLR (version 4.0). Installing 3.5 will not break any 4.x applications.
Here are the official, safe download links directly from Microsoft: