Net Framework 45 Developer Pack Link

Here is the official, verified :

Looking for the ? While Version 4.5 reached its end of life on April 26, 2022, developers often still need it to maintain legacy applications or compile older projects in Visual Studio.

The Developer Pack (also known as the Targeting Pack) is different from the standard runtime:

Where to Find the Official .NET Framework 4.5 Developer Pack (Download Link & Installation Guide)

Check the DWORD value to determine the specific sub-version. ⚠️ Important Security Note