.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
The .NET Framework 4.5 Developer Pack is a software package that provides developers with the necessary tools and libraries to build, test, and deploy applications that target the .NET Framework 4.5. This article has provided a comprehensive guide on how to download and install the .NET Framework 4.5 Developer Pack, along with some additional information on its features and benefits. net framework 45 developer pack link
Windows 7 SP1, Windows 8, Windows 8.1, Windows Server 2008 R2 SP1, or Windows Server 2012. HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\
HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\.NETFramework\v4.0.30319\SKUs\.NETFramework,Version=v4.5 Version=v4.5 .NET 4.5 is "in-place
.NET 4.5 is "in-place," meaning 4.8 will usually run 4.5 code, but you still need the 4.5 SDK to build it specifically.