: You can use the Full Redistributable Package (offline installer), which contains all necessary files for installation without an internet connection. Official Download Links
: Microsoft recommends using newer versions like .NET 8 for new app development, as .NET 3.5 is an older legacy version primarily used for running existing applications. Microsoft .NET Framework 3.5 Service Pack 1 : You can use the Full Redistributable Package
However, the best way to get it depends on your current version of Windows, as it is often already included as a built-in feature: Download Microsoft
You can download the for free directly from the official Microsoft Download Center . Download Center
Download Microsoft . NET Framework 3.5 Service Pack 1 from Official Microsoft Download Center. Download Center. Download Center. Microsoft .NET Framework 3.5 Service Pack 1