This guide provides everything you need to know about the , its components, and why it remains a critical asset for maintaining legacy software environments. What is the .NET Framework 4.5 Developer Pack?

. NET Framework 4.5. 2, 4.6, and 4.6. 1 retired on April 26, 2022. Microsoft Learn Determine which .NET Framework versions are installed

Continued use of 4.5 may expose your environment to vulnerabilities that are no longer patched.