.NET Framework 4.5 Developer Pack (which includes the Multi-Targeting Pack) is no longer available as a standalone direct download from official Microsoft pages because version 4.5 reached its end of support on January 12, 2016
.NET Framework 4.5.2 Developer Pack (Most common legacy target) .NET Framework 4.5.1 Developer Pack .NET Framework 4.5 Base Runtime What is in the Developer Pack? net framework 45 developer pack link
This method is the safest and most modern approach. Runtime: installs CLR and libraries so apps can
Last updated: October 2025. Information verified against Microsoft’s official download infrastructure. This method is the safest and most modern approach
sfc /scannow in an admin command prompt.