Microsoft hosts these files officially. To ensure security, always download directly from Microsoft’s servers rather than third-party software repositories.
However, the offline installer is not without its caveats. The most significant is that it does not include the latest security updates. After installing the base version 4.7.2 offline, an administrator must still apply the relevant monthly quality rollups via Windows Update or WSUS (Windows Server Update Services). In highly secure environments, this two-step process—offline base install, then update patches—is standard practice. Additionally, the offline installer is larger and requires more initial bandwidth to acquire. Finally, Microsoft has ceased active feature development for .NET Framework 4.x, but it continues to support it with security updates, meaning the offline base version remains relevant but should be paired with an update strategy. net framework 4.7 2 offline