The official, safest method to obtain the developer pack is through the or the Visual Studio Older Downloads archive.
The following "Developer Packs" include the runtime, the multi-targeting pack (for building apps), and language packs:
Installation and distribution notes
If you only need to run applications (not develop them), you can use the standard redistributable installer: . Alternative Methods for Modern Visual Studio
. To develop or maintain applications targeting this specific version, you must use specific workarounds or later compatible developer packs. Stack Overflow Recommended Official Links and Workarounds
Official Microsoft Download Center
Check the DWORD value to determine the specific sub-version. ⚠️ Important Security Note
– The most updated version of the 4.5 series, including the multi-targeting pack and reference assemblies. .NET Framework 4.5.1 Developer Pack
The Developer Pack (formerly known as a Multi-Targeting Pack) is a software bundle used by developers to create applications that run on a specific version of the .NET Framework.
Before downloading, ensure your development machine meets the minimum requirements: