Here is the direct download link and information for the .
If you need to deploy the runtime to machines without internet access, look for the ".NET Framework 4.5 Offline Installer" on the Microsoft Download Center. What is the .NET Framework 4.5 Developer Pack? net framework 45 developer pack link
Microsoft strongly recommends updating to a supported version, such as NET Framework 4.8.1 , to ensure your applications receive critical security fixes. Here is the direct download link and information for the
Without the Developer Pack, your computer might run .NET 4.5 apps perfectly, but Visual Studio will refuse to compile new code targeting that framework version. Ensure you are running the specific Targeting Pack
The runtime cannot be downgraded, but the developer pack can still be added. Ensure you are running the specific Targeting Pack MSI rather than the full runtime installer. To help find the exact variant you need, tell me: What version of Visual Studio are you using?
The .NET Framework 4.5 Developer Pack is a collection of libraries, tools, and documentation that developers need to create applications that run on the .NET Framework 4.5. This package includes the .NET Framework 4.5 SDK, which provides a set of libraries and tools for building Windows desktop applications, web applications, and mobile apps.