The Microsoft .NET Framework 4.5 Developer Pack (and its updates like 4.5.1 and 4.5.2) is a comprehensive package used by software developers to build and target applications for these specific versions using Visual Studio.
Important: Windows 8 and Windows Server 2012 come with .NET 4.5 Runtime pre-installed, but the Developer Pack is still required for development.
Official Download Link Recap:
https://download.microsoft.com/download/2/B/6/2B6B78C3-EAB9-4C33-ABD8-DC29BF064D14/NDP45-DevPack.exe microsoft .net framework 4.5 developer pack download
Unlike a standard runtime installer meant for end-users, the Developer Pack bundles several critical tools for the development lifecycle:
The Microsoft .NET Framework 4.5 Developer Pack download is a cornerstone for developers working with legacy Windows applications, older ASP.NET WebForms, or WCF services. While Microsoft now encourages migration to modern .NET (6+), millions of lines of production code still rely on 4.5. The Microsoft
Windows 7 SP1, Windows 8, Windows 8.1, or Windows Server 2008/2012/R2. Processor: 1 GHz or faster. Disk Space: ~850 MB for x86 or ~2 GB for x64. Note for Windows 8 users: .NET Framework 4.5 is already included in Windows 8 and Windows Server 2012
Installing: .NET Framework 4.5 Multi-Targeting Pack.Installing: .NET Framework 4.5 SDK. The bar hit 100%. While Microsoft now encourages migration to modern
The .NET Framework 4.5.1 (Offline Installer) and ... - Microsoft Support
IntelliSense Language Packs: Files that provide tooltips and code documentation in your IDE. System Requirements