If your timeline and budget allow, consider upgrading your application to a supported framework version:
This package installs the multi-targeting pack for .NET Framework 4.5.1. Developers can build applications targeting .NET Framework 4.5.1 using Visual Studio 2012 or third-party IDEs.
Read and accept the Microsoft Software License Terms.
When you install the 4.5 Developer Pack, your system receives: The .NET Framework 4.5 Multi-Targeting Pack microsoft .net framework 4.5 developer pack download
Report: Microsoft .NET Framework 4.5 Developer Pack Microsoft .NET Framework 4.5 Developer Pack
Install Visual Studio 2017 or 2019 alongside newer versions for .NET 4.5 targeting, as these versions have better native support for older frameworks.
Verify that appears as a selectable option. Troubleshooting Common Installation Issues If your timeline and budget allow, consider upgrading
It contains:
Before you download the 4.5 Developer Pack, keep these critical factors in mind:
This approach works reliably and is recommended for development environments where Microsoft no longer provides direct downloads. When you install the 4
For developers using Visual Studio 2019 or earlier:
Once downloaded, run the NDP45-DevPack-KB2750149.exe (or similar version) file. 3. Installation Process